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Merge branch 'akpm' (patchbomb from Andrew) 

Merge first patchbomb from Andrew Morton:
 - a few minor cifs fixes
 - dma-debug upadtes
 - ocfs2
 - slab
 - about half of MM
 - procfs
 - kernel/exit.c
 - panic.c tweaks
 - printk upates
 - lib/ updates
 - checkpatch updates
 - fs/binfmt updates
 - the drivers/rtc tree
 - nilfs
 - kmod fixes
 - more kernel/exit.c
 - various other misc tweaks and fixes

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (190 commits)
  exit: pidns: fix/update the comments in zap_pid_ns_processes()
  exit: pidns: alloc_pid() leaks pid_namespace if child_reaper is exiting
  exit: exit_notify: re-use "dead" list to autoreap current
  exit: reparent: call forget_original_parent() under tasklist_lock
  exit: reparent: avoid find_new_reaper() if no children
  exit: reparent: introduce find_alive_thread()
  exit: reparent: introduce find_child_reaper()
  exit: reparent: document the ->has_child_subreaper checks
  exit: reparent: s/while_each_thread/for_each_thread/ in find_new_reaper()
  exit: reparent: fix the cross-namespace PR_SET_CHILD_SUBREAPER reparenting
  exit: reparent: fix the dead-parent PR_SET_CHILD_SUBREAPER reparenting
  exit: proc: don't try to flush /proc/tgid/task/tgid
  exit: release_task: fix the comment about group leader accounting
  exit: wait: drop tasklist_lock before psig->c* accounting
  exit: wait: don't use zombie->real_parent
  exit: wait: cleanup the ptrace_reparented() checks
  usermodehelper: kill the kmod_thread_locker logic
  usermodehelper: don't use CLONE_VFORK for ____call_usermodehelper()
  fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp
  nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races
  ...
hifive-unleashed-5.1
Linus Torvalds 2014-12-10 18:34:42 -08:00
parent cbfe0de303 a53b831549
commit b6da0076ba
142 changed files with 3681 additions and 3966 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/cgroups/hugetlb.txt
View File

@ -29,7 +29,7 @@ Brief summary of control files
hugetlb.<hugepagesize>.limit_in_bytes # set/show limit of "hugepagesize" hugetlb usage
hugetlb.<hugepagesize>.max_usage_in_bytes # show max "hugepagesize" hugetlb usage recorded
hugetlb.<hugepagesize>.usage_in_bytes # show current res_counter usage for "hugepagesize" hugetlb
hugetlb.<hugepagesize>.usage_in_bytes # show current usage for "hugepagesize" hugetlb
hugetlb.<hugepagesize>.failcnt # show the number of allocation failure due to HugeTLB limit
For a system supporting two hugepage size (16M and 16G) the control

26
Documentation/cgroups/memory.txt
View File

@ -1,5 +1,10 @@
Memory Resource Controller
NOTE: This document is hopelessly outdated and it asks for a complete
rewrite. It still contains a useful information so we are keeping it
here but make sure to check the current code if you need a deeper
understanding.
NOTE: The Memory Resource Controller has generically been referred to as the
memory controller in this document. Do not confuse memory controller
used here with the memory controller that is used in hardware.
@ -52,9 +57,9 @@ Brief summary of control files.
tasks # attach a task(thread) and show list of threads
cgroup.procs # show list of processes
cgroup.event_control # an interface for event_fd()
memory.usage_in_bytes # show current res_counter usage for memory
memory.usage_in_bytes # show current usage for memory
(See 5.5 for details)
memory.memsw.usage_in_bytes # show current res_counter usage for memory+Swap
memory.memsw.usage_in_bytes # show current usage for memory+Swap
(See 5.5 for details)
memory.limit_in_bytes # set/show limit of memory usage
memory.memsw.limit_in_bytes # set/show limit of memory+Swap usage
@ -116,16 +121,16 @@ The memory controller is the first controller developed.
2.1. Design
The core of the design is a counter called the res_counter. The res_counter
tracks the current memory usage and limit of the group of processes associated
with the controller. Each cgroup has a memory controller specific data
structure (mem_cgroup) associated with it.
The core of the design is a counter called the page_counter. The
page_counter tracks the current memory usage and limit of the group of
processes associated with the controller. Each cgroup has a memory controller
specific data structure (mem_cgroup) associated with it.
2.2. Accounting
+--------------------+
| mem_cgroup |
| (res_counter) |
| mem_cgroup |
| (page_counter) |
+--------------------+
/ ^ \
/ | \
@ -352,9 +357,8 @@ set:
0. Configuration
a. Enable CONFIG_CGROUPS
b. Enable CONFIG_RESOURCE_COUNTERS
c. Enable CONFIG_MEMCG
d. Enable CONFIG_MEMCG_SWAP (to use swap extension)
b. Enable CONFIG_MEMCG
c. Enable CONFIG_MEMCG_SWAP (to use swap extension)
d. Enable CONFIG_MEMCG_KMEM (to use kmem extension)
1. Prepare the cgroups (see cgroups.txt, Why are cgroups needed?)

197
Documentation/cgroups/resource_counter.txt
View File

@ -1,197 +0,0 @@
The Resource Counter
The resource counter, declared at include/linux/res_counter.h,
is supposed to facilitate the resource management by controllers
by providing common stuff for accounting.
This "stuff" includes the res_counter structure and routines
to work with it.
1. Crucial parts of the res_counter structure
a. unsigned long long usage
The usage value shows the amount of a resource that is consumed
by a group at a given time. The units of measurement should be
determined by the controller that uses this counter. E.g. it can
be bytes, items or any other unit the controller operates on.
b. unsigned long long max_usage
The maximal value of the usage over time.
This value is useful when gathering statistical information about
the particular group, as it shows the actual resource requirements
for a particular group, not just some usage snapshot.
c. unsigned long long limit
The maximal allowed amount of resource to consume by the group. In
case the group requests for more resources, so that the usage value
would exceed the limit, the resource allocation is rejected (see
the next section).
d. unsigned long long failcnt
The failcnt stands for "failures counter". This is the number of
resource allocation attempts that failed.
c. spinlock_t lock
Protects changes of the above values.
2. Basic accounting routines
a. void res_counter_init(struct res_counter *rc,
struct res_counter *rc_parent)
Initializes the resource counter. As usual, should be the first
routine called for a new counter.
The struct res_counter *parent can be used to define a hierarchical
child -> parent relationship directly in the res_counter structure,
NULL can be used to define no relationship.
c. int res_counter_charge(struct res_counter *rc, unsigned long val,
struct res_counter **limit_fail_at)
When a resource is about to be allocated it has to be accounted
with the appropriate resource counter (controller should determine
which one to use on its own). This operation is called "charging".
This is not very important which operation - resource allocation
or charging - is performed first, but
* if the allocation is performed first, this may create a
temporary resource over-usage by the time resource counter is
charged;
* if the charging is performed first, then it should be uncharged
on error path (if the one is called).
If the charging fails and a hierarchical dependency exists, the
limit_fail_at parameter is set to the particular res_counter element
where the charging failed.
d. u64 res_counter_uncharge(struct res_counter *rc, unsigned long val)
When a resource is released (freed) it should be de-accounted
from the resource counter it was accounted to. This is called
"uncharging". The return value of this function indicate the amount
of charges still present in the counter.
The _locked routines imply that the res_counter->lock is taken.
e. u64 res_counter_uncharge_until
(struct res_counter *rc, struct res_counter *top,
unsigned long val)
Almost same as res_counter_uncharge() but propagation of uncharge
stops when rc == top. This is useful when kill a res_counter in
child cgroup.
2.1 Other accounting routines
There are more routines that may help you with common needs, like
checking whether the limit is reached or resetting the max_usage
value. They are all declared in include/linux/res_counter.h.
3. Analyzing the resource counter registrations
a. If the failcnt value constantly grows, this means that the counter's
limit is too tight. Either the group is misbehaving and consumes too
many resources, or the configuration is not suitable for the group
and the limit should be increased.
b. The max_usage value can be used to quickly tune the group. One may
set the limits to maximal values and either load the container with
a common pattern or leave one for a while. After this the max_usage
value shows the amount of memory the container would require during
its common activity.
Setting the limit a bit above this value gives a pretty good
configuration that works in most of the cases.
c. If the max_usage is much less than the limit, but the failcnt value
is growing, then the group tries to allocate a big chunk of resource
at once.
d. If the max_usage is much less than the limit, but the failcnt value
is 0, then this group is given too high limit, that it does not
require. It is better to lower the limit a bit leaving more resource
for other groups.
4. Communication with the control groups subsystem (cgroups)
All the resource controllers that are using cgroups and resource counters
should provide files (in the cgroup filesystem) to work with the resource
counter fields. They are recommended to adhere to the following rules:
a. File names
Field name File name
---------------------------------------------------
usage usage_in_<unit_of_measurement>
max_usage max_usage_in_<unit_of_measurement>
limit limit_in_<unit_of_measurement>
failcnt failcnt
lock no file :)
b. Reading from file should show the corresponding field value in the
appropriate format.
c. Writing to file
Field Expected behavior
----------------------------------
usage prohibited
max_usage reset to usage
limit set the limit
failcnt reset to zero
5. Usage example
a. Declare a task group (take a look at cgroups subsystem for this) and
fold a res_counter into it
struct my_group {
struct res_counter res;
<other fields>
}
b. Put hooks in resource allocation/release paths
int alloc_something(...)
{
if (res_counter_charge(res_counter_ptr, amount) < 0)
return -ENOMEM;
<allocate the resource and return to the caller>
}
void release_something(...)
{
res_counter_uncharge(res_counter_ptr, amount);
<release the resource>
}
In order to keep the usage value self-consistent, both the
"res_counter_ptr" and the "amount" in release_something() should be
the same as they were in the alloc_something() when the releasing
resource was allocated.
c. Provide the way to read res_counter values and set them (the cgroups
still can help with it).
c. Compile and run :)

9
Documentation/devicetree/bindings/rtc/rtc-omap.txt
View File

@ -5,11 +5,17 @@ Required properties:
- "ti,da830-rtc" - for RTC IP used similar to that on DA8xx SoC family.
- "ti,am3352-rtc" - for RTC IP used similar to that on AM335x SoC family.
This RTC IP has special WAKE-EN Register to enable
Wakeup generation for event Alarm.
Wakeup generation for event Alarm. It can also be
used to control an external PMIC via the
pmic_power_en pin.
- reg: Address range of rtc register set
- interrupts: rtc timer, alarm interrupts in order
- interrupt-parent: phandle for the interrupt controller
Optional properties:
- system-power-controller: whether the rtc is controlling the system power
through pmic_power_en
Example:
rtc@1c23000 {
@ -18,4 +24,5 @@ rtc@1c23000 {
interrupts = <19
19>;
interrupt-parent = <&intc>;
system-power-controller;
};

1
Documentation/devicetree/bindings/vendor-prefixes.txt
View File

@ -115,6 +115,7 @@ nxp NXP Semiconductors
onnn ON Semiconductor Corp.
opencores OpenCores.org
panasonic Panasonic Corporation
pericom Pericom Technology Inc.
phytec PHYTEC Messtechnik GmbH
picochip Picochip Ltd
plathome Plat'Home Co., Ltd.

7
Documentation/kdump/kdump.txt
View File

@ -471,6 +471,13 @@ format. Crash is available on Dave Anderson's site at the following URL:
http://people.redhat.com/~anderson/
Trigger Kdump on WARN()
=======================
The kernel parameter, panic_on_warn, calls panic() in all WARN() paths. This
will cause a kdump to occur at the panic() call. In cases where a user wants
to specify this during runtime, /proc/sys/kernel/panic_on_warn can be set to 1
to achieve the same behaviour.
Contact
=======

3
Documentation/kernel-parameters.txt
View File

@ -2509,6 +2509,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
timeout < 0: reboot immediately
Format: <timeout>
panic_on_warn panic() instead of WARN(). Useful to cause kdump
on a WARN().
crash_kexec_post_notifiers
Run kdump after running panic-notifiers and dumping
kmsg. This only for the users who doubt kdump always

40
Documentation/sysctl/kernel.txt
View File

@ -54,8 +54,9 @@ show up in /proc/sys/kernel:
- overflowuid
- panic
- panic_on_oops
- panic_on_unrecovered_nmi
- panic_on_stackoverflow
- panic_on_unrecovered_nmi
- panic_on_warn
- pid_max
- powersave-nap [ PPC only ]
- printk
@ -527,19 +528,6 @@ the recommended setting is 60.
==============================================================
panic_on_unrecovered_nmi:
The default Linux behaviour on an NMI of either memory or unknown is
to continue operation. For many environments such as scientific
computing it is preferable that the box is taken out and the error
dealt with than an uncorrected parity/ECC error get propagated.
A small number of systems do generate NMI's for bizarre random reasons
such as power management so the default is off. That sysctl works like
the existing panic controls already in that directory.
==============================================================
panic_on_oops:
Controls the kernel's behaviour when an oops or BUG is encountered.
@ -563,6 +551,30 @@ This file shows up if CONFIG_DEBUG_STACKOVERFLOW is enabled.
==============================================================
panic_on_unrecovered_nmi:
The default Linux behaviour on an NMI of either memory or unknown is
to continue operation. For many environments such as scientific
computing it is preferable that the box is taken out and the error
dealt with than an uncorrected parity/ECC error get propagated.
A small number of systems do generate NMI's for bizarre random reasons
such as power management so the default is off. That sysctl works like
the existing panic controls already in that directory.
==============================================================
panic_on_warn:
Calls panic() in the WARN() path when set to 1. This is useful to avoid
a kernel rebuild when attempting to kdump at the location of a WARN().
0: only WARN(), default behaviour.
1: call panic() after printing out WARN() location.
==============================================================
perf_cpu_time_max_percent:
Hints to the kernel how much CPU time it should be allowed to

6
MAINTAINERS
View File

@ -2605,7 +2605,7 @@ L: cgroups@vger.kernel.org
L: linux-mm@kvack.org
S: Maintained
F: mm/memcontrol.c
F: mm/page_cgroup.c
F: mm/swap_cgroup.c
CORETEMP HARDWARE MONITORING DRIVER
M: Fenghua Yu <fenghua.yu@intel.com>
@ -2722,7 +2722,7 @@ F: drivers/net/wireless/cw1200/
CX18 VIDEO4LINUX DRIVER
M: Andy Walls <awalls@md.metrocast.net>
L: ivtv-devel@ivtvdriver.org (moderated for non-subscribers)
L: ivtv-devel@ivtvdriver.org (subscribers-only)
L: linux-media@vger.kernel.org
T: git git://linuxtv.org/media_tree.git
W: http://linuxtv.org
@ -5208,7 +5208,7 @@ F: drivers/media/tuners/it913x*
IVTV VIDEO4LINUX DRIVER
M: Andy Walls <awalls@md.metrocast.net>
L: ivtv-devel@ivtvdriver.org (moderated for non-subscribers)
L: ivtv-devel@ivtvdriver.org (subscribers-only)
L: linux-media@vger.kernel.org
T: git git://linuxtv.org/media_tree.git
W: http://www.ivtvdriver.org

4
arch/arm/boot/dts/am335x-boneblack.dts
View File

@ -80,3 +80,7 @@
status = "okay";
};
};
&rtc {
system-power-controller;
};

2
arch/arm/boot/dts/am33xx.dtsi
View File

@ -435,7 +435,7 @@
};
rtc: rtc@44e3e000 {
compatible = "ti,da830-rtc";
compatible = "ti,am3352-rtc", "ti,da830-rtc";
reg = <0x44e3e000 0x1000>;
interrupts = <75
76>;

1
arch/arm64/include/asm/pgtable.h
View File

@ -279,6 +279,7 @@ void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address,
#endif /* CONFIG_HAVE_RCU_TABLE_FREE */
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
#define pmd_young(pmd) pte_young(pmd_pte(pmd))
#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
#define pmd_mksplitting(pmd) pte_pmd(pte_mkspecial(pmd_pte(pmd)))

2
arch/ia64/kernel/perfmon.c
View File

@ -2662,7 +2662,7 @@ pfm_context_create(pfm_context_t *ctx, void *arg, int count, struct pt_regs *reg
ret = -ENOMEM;
fd = get_unused_fd();
fd = get_unused_fd_flags(0);
if (fd < 0)
return fd;

1
arch/powerpc/include/asm/pgtable-ppc64.h
View File

@ -467,6 +467,7 @@ static inline pte_t *pmdp_ptep(pmd_t *pmd)
}
#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
#define pmd_young(pmd) pte_young(pmd_pte(pmd))
#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))

4
arch/powerpc/platforms/cell/spufs/inode.c
View File

@ -301,7 +301,7 @@ static int spufs_context_open(struct path *path)
int ret;
struct file *filp;
ret = get_unused_fd();
ret = get_unused_fd_flags(0);
if (ret < 0)
return ret;
@ -518,7 +518,7 @@ static int spufs_gang_open(struct path *path)
int ret;
struct file *filp;
ret = get_unused_fd();
ret = get_unused_fd_flags(0);
if (ret < 0)
return ret;

2
arch/sh/mm/numa.c
View File

@ -31,7 +31,7 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
unsigned long bootmem_paddr;
/* Don't allow bogus node assignment */
BUG_ON(nid > MAX_NUMNODES || nid <= 0);
BUG_ON(nid >= MAX_NUMNODES || nid <= 0);
start_pfn = start >> PAGE_SHIFT;
end_pfn = end >> PAGE_SHIFT;

7
arch/sparc/include/asm/pgtable_64.h
View File

@ -667,6 +667,13 @@ static inline unsigned long pmd_pfn(pmd_t pmd)
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline unsigned long pmd_dirty(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
return pte_dirty(pte);
}
static inline unsigned long pmd_young(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));

19
arch/tile/kernel/early_printk.c
View File

@ -43,13 +43,20 @@ static struct console early_hv_console = {
void early_panic(const char *fmt, ...)
{
va_list ap;
struct va_format vaf;
va_list args;
arch_local_irq_disable_all();
va_start(ap, fmt);
early_printk("Kernel panic - not syncing: ");
early_vprintk(fmt, ap);
early_printk("\n");
va_end(ap);
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
early_printk("Kernel panic - not syncing: %pV", &vaf);
va_end(args);
dump_stack();
hv_halt();
}

45
arch/tile/kernel/setup.c
View File

@ -534,11 +534,10 @@ static void __init setup_memory(void)
}
}
physpages -= dropped_pages;
pr_warning("Only using %ldMB memory;"
" ignoring %ldMB.\n",
physpages >> (20 - PAGE_SHIFT),
dropped_pages >> (20 - PAGE_SHIFT));
pr_warning("Consider using a larger page size.\n");
pr_warn("Only using %ldMB memory - ignoring %ldMB\n",
physpages >> (20 - PAGE_SHIFT),
dropped_pages >> (20 - PAGE_SHIFT));
pr_warn("Consider using a larger page size\n");
}
#endif
@ -566,9 +565,8 @@ static void __init setup_memory(void)
#ifndef __tilegx__
if (node_end_pfn[0] > MAXMEM_PFN) {
pr_warning("Only using %ldMB LOWMEM.\n",
MAXMEM>>20);
pr_warning("Use a HIGHMEM enabled kernel.\n");
pr_warn("Only using %ldMB LOWMEM\n", MAXMEM >> 20);
pr_warn("Use a HIGHMEM enabled kernel\n");
max_low_pfn = MAXMEM_PFN;
max_pfn = MAXMEM_PFN;
node_end_pfn[0] = MAXMEM_PFN;
@ -1112,8 +1110,8 @@ static void __init load_hv_initrd(void)
fd = hv_fs_findfile((HV_VirtAddr) initramfs_file);
if (fd == HV_ENOENT) {
if (set_initramfs_file) {
pr_warning("No such hvfs initramfs file '%s'\n",
initramfs_file);
pr_warn("No such hvfs initramfs file '%s'\n",
initramfs_file);
return;
} else {
/* Try old backwards-compatible name. */
@ -1126,8 +1124,8 @@ static void __init load_hv_initrd(void)
stat = hv_fs_fstat(fd);
BUG_ON(stat.size < 0);
if (stat.flags & HV_FS_ISDIR) {
pr_warning("Ignoring hvfs file '%s': it's a directory.\n",
initramfs_file);
pr_warn("Ignoring hvfs file '%s': it's a directory\n",
initramfs_file);
return;
}
initrd = alloc_bootmem_pages(stat.size);
@ -1185,9 +1183,8 @@ static void __init validate_hv(void)
HV_Topology topology = hv_inquire_topology();
BUG_ON(topology.coord.x != 0 || topology.coord.y != 0);
if (topology.width != 1 || topology.height != 1) {
pr_warning("Warning: booting UP kernel on %dx%d grid;"
" will ignore all but first tile.\n",
topology.width, topology.height);
pr_warn("Warning: booting UP kernel on %dx%d grid; will ignore all but first tile\n",
topology.width, topology.height);
}
#endif
@ -1208,9 +1205,8 @@ static void __init validate_hv(void)
* We use a struct cpumask for this, so it must be big enough.
*/
if ((smp_height * smp_width) > nr_cpu_ids)
early_panic("Hypervisor %d x %d grid too big for Linux"
" NR_CPUS %d\n", smp_height, smp_width,
nr_cpu_ids);
early_panic("Hypervisor %d x %d grid too big for Linux NR_CPUS %d\n",
smp_height, smp_width, nr_cpu_ids);
#endif
/*
@ -1265,10 +1261,9 @@ static void __init validate_va(void)
/* Kernel PCs must have their high bit set; see intvec.S. */
if ((long)VMALLOC_START >= 0)
early_panic(
"Linux VMALLOC region below the 2GB line (%#lx)!\n"
"Reconfigure the kernel with smaller VMALLOC_RESERVE.\n",
VMALLOC_START);
early_panic("Linux VMALLOC region below the 2GB line (%#lx)!\n"
"Reconfigure the kernel with smaller VMALLOC_RESERVE\n",
VMALLOC_START);
#endif
}
@ -1395,7 +1390,7 @@ static void __init setup_cpu_maps(void)
static int __init dataplane(char *str)
{
pr_warning("WARNING: dataplane support disabled in this kernel\n");
pr_warn("WARNING: dataplane support disabled in this kernel\n");
return 0;
}
@ -1413,8 +1408,8 @@ void __init setup_arch(char **cmdline_p)
len = hv_get_command_line((HV_VirtAddr) boot_command_line,
COMMAND_LINE_SIZE);
if (boot_command_line[0])
pr_warning("WARNING: ignoring dynamic command line \"%s\"\n",
boot_command_line);
pr_warn("WARNING: ignoring dynamic command line \"%s\"\n",
boot_command_line);
strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
#else
char *hv_cmdline;

5
arch/x86/include/asm/pgtable.h
View File

@ -100,6 +100,11 @@ static inline int pte_young(pte_t pte)
return pte_flags(pte) & _PAGE_ACCESSED;
}
static inline int pmd_dirty(pmd_t pmd)
{
return pmd_flags(pmd) & _PAGE_DIRTY;
}
static inline int pmd_young(pmd_t pmd)
{
return pmd_flags(pmd) & _PAGE_ACCESSED;

8
drivers/base/Kconfig
View File

@ -267,18 +267,24 @@ comment "Default contiguous memory area size:"
config CMA_SIZE_MBYTES
int "Size in Mega Bytes"
depends on !CMA_SIZE_SEL_PERCENTAGE
default 0 if X86
default 16
help
Defines the size (in MiB) of the default memory area for Contiguous
Memory Allocator.
Memory Allocator. If the size of 0 is selected, CMA is disabled by
default, but it can be enabled by passing cma=size[MG] to the kernel.
config CMA_SIZE_PERCENTAGE
int "Percentage of total memory"
depends on !CMA_SIZE_SEL_MBYTES
default 0 if X86
default 10
help
Defines the size of the default memory area for Contiguous Memory
Allocator as a percentage of the total memory in the system.
If 0 percent is selected, CMA is disabled by default, but it can be
enabled by passing cma=size[MG] to the kernel.
choice
prompt "Selected region size"

8
drivers/rtc/Kconfig
View File

@ -192,6 +192,14 @@ config RTC_DRV_DS1374
This driver can also be built as a module. If so, the module
will be called rtc-ds1374.
config RTC_DRV_DS1374_WDT
bool "Dallas/Maxim DS1374 watchdog timer"
depends on RTC_DRV_DS1374
help
If you say Y here you will get support for the
watchdog timer in the Dallas Semiconductor DS1374
real-time clock chips.
config RTC_DRV_DS1672
tristate "Dallas/Maxim DS1672"
help

21
drivers/rtc/interface.c
View File

@ -30,6 +30,14 @@ static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)
else {
memset(tm, 0, sizeof(struct rtc_time));
err = rtc->ops->read_time(rtc->dev.parent, tm);
if (err < 0) {
dev_err(&rtc->dev, "read_time: fail to read\n");
return err;
}
err = rtc_valid_tm(tm);
if (err < 0)
dev_err(&rtc->dev, "read_time: rtc_time isn't valid\n");
}
return err;
}
@ -891,11 +899,24 @@ again:
if (next) {
struct rtc_wkalrm alarm;
int err;
int retry = 3;
alarm.time = rtc_ktime_to_tm(next->expires);
alarm.enabled = 1;
reprogram:
err = __rtc_set_alarm(rtc, &alarm);
if (err == -ETIME)
goto again;
else if (err) {
if (retry-- > 0)
goto reprogram;
timer = container_of(next, struct rtc_timer, node);
timerqueue_del(&rtc->timerqueue, &timer->node);
timer->enabled = 0;
dev_err(&rtc->dev, "__rtc_set_alarm: err=%d\n", err);
goto again;
}
} else
rtc_alarm_disable(rtc);

2
drivers/rtc/rtc-ab8500.c
View File

@ -504,6 +504,8 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
return err;
}
rtc->uie_unsupported = 1;
return 0;
}

125
drivers/rtc/rtc-ds1307.c
View File

@ -35,7 +35,7 @@ enum ds_type {
ds_1388,
ds_3231,
m41t00,
mcp7941x,
mcp794xx,
rx_8025,
last_ds_type /* always last */
/* rs5c372 too? different address... */
@ -46,7 +46,7 @@ enum ds_type {
#define DS1307_REG_SECS 0x00 /* 00-59 */
# define DS1307_BIT_CH 0x80
# define DS1340_BIT_nEOSC 0x80
# define MCP7941X_BIT_ST 0x80
# define MCP794XX_BIT_ST 0x80
#define DS1307_REG_MIN 0x01 /* 00-59 */
#define DS1307_REG_HOUR 0x02 /* 00-23, or 1-12{am,pm} */
# define DS1307_BIT_12HR 0x40 /* in REG_HOUR */
@ -54,7 +54,7 @@ enum ds_type {
# define DS1340_BIT_CENTURY_EN 0x80 /* in REG_HOUR */
# define DS1340_BIT_CENTURY 0x40 /* in REG_HOUR */
#define DS1307_REG_WDAY 0x03 /* 01-07 */
# define MCP7941X_BIT_VBATEN 0x08
# define MCP794XX_BIT_VBATEN 0x08
#define DS1307_REG_MDAY 0x04 /* 01-31 */
#define DS1307_REG_MONTH 0x05 /* 01-12 */
# define DS1337_BIT_CENTURY 0x80 /* in REG_MONTH */
@ -159,7 +159,7 @@ static struct chip_desc chips[last_ds_type] = {
[ds_3231] = {
.alarm = 1,
},
[mcp7941x] = {
[mcp794xx] = {
.alarm = 1,
/* this is battery backed SRAM */
.nvram_offset = 0x20,
@ -176,7 +176,8 @@ static const struct i2c_device_id ds1307_id[] = {
{ "ds1340", ds_1340 },
{ "ds3231", ds_3231 },
{ "m41t00", m41t00 },
{ "mcp7941x", mcp7941x },
{ "mcp7940x", mcp794xx },
{ "mcp7941x", mcp794xx },
{ "pt7c4338", ds_1307 },
{ "rx8025", rx_8025 },
{ }
@ -439,14 +440,14 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY_EN
| DS1340_BIT_CENTURY;
break;
case mcp7941x:
case mcp794xx:
/*
* these bits were cleared when preparing the date/time
* values and need to be set again before writing the
* buffer out to the device.
*/
buf[DS1307_REG_SECS] |= MCP7941X_BIT_ST;
buf[DS1307_REG_WDAY] |= MCP7941X_BIT_VBATEN;
buf[DS1307_REG_SECS] |= MCP794XX_BIT_ST;
buf[DS1307_REG_WDAY] |= MCP794XX_BIT_VBATEN;
break;
default:
break;
@ -614,26 +615,26 @@ static const struct rtc_class_ops ds13xx_rtc_ops = {
/*----------------------------------------------------------------------*/
/*
* Alarm support for mcp7941x devices.
* Alarm support for mcp794xx devices.
*/
#define MCP7941X_REG_CONTROL 0x07
# define MCP7941X_BIT_ALM0_EN 0x10
# define MCP7941X_BIT_ALM1_EN 0x20
#define MCP7941X_REG_ALARM0_BASE 0x0a
#define MCP7941X_REG_ALARM0_CTRL 0x0d
#define MCP7941X_REG_ALARM1_BASE 0x11
#define MCP7941X_REG_ALARM1_CTRL 0x14
# define MCP7941X_BIT_ALMX_IF (1 << 3)
# define MCP7941X_BIT_ALMX_C0 (1 << 4)
# define MCP7941X_BIT_ALMX_C1 (1 << 5)
# define MCP7941X_BIT_ALMX_C2 (1 << 6)
# define MCP7941X_BIT_ALMX_POL (1 << 7)
# define MCP7941X_MSK_ALMX_MATCH (MCP7941X_BIT_ALMX_C0 | \
MCP7941X_BIT_ALMX_C1 | \
MCP7941X_BIT_ALMX_C2)
#define MCP794XX_REG_CONTROL 0x07
# define MCP794XX_BIT_ALM0_EN 0x10
# define MCP794XX_BIT_ALM1_EN 0x20
#define MCP794XX_REG_ALARM0_BASE 0x0a
#define MCP794XX_REG_ALARM0_CTRL 0x0d
#define MCP794XX_REG_ALARM1_BASE 0x11
#define MCP794XX_REG_ALARM1_CTRL 0x14
# define MCP794XX_BIT_ALMX_IF (1 << 3)
# define MCP794XX_BIT_ALMX_C0 (1 << 4)
# define MCP794XX_BIT_ALMX_C1 (1 << 5)
# define MCP794XX_BIT_ALMX_C2 (1 << 6)
# define MCP794XX_BIT_ALMX_POL (1 << 7)
# define MCP794XX_MSK_ALMX_MATCH (MCP794XX_BIT_ALMX_C0 | \
MCP794XX_BIT_ALMX_C1 | \
MCP794XX_BIT_ALMX_C2)
static void mcp7941x_work(struct work_struct *work)
static void mcp794xx_work(struct work_struct *work)
{
struct ds1307 *ds1307 = container_of(work, struct ds1307, work);
struct i2c_client *client = ds1307->client;
@ -642,22 +643,22 @@ static void mcp7941x_work(struct work_struct *work)
mutex_lock(&ds1307->rtc->ops_lock);
/* Check and clear alarm 0 interrupt flag. */
reg = i2c_smbus_read_byte_data(client, MCP7941X_REG_ALARM0_CTRL);
reg = i2c_smbus_read_byte_data(client, MCP794XX_REG_ALARM0_CTRL);
if (reg < 0)
goto out;
if (!(reg & MCP7941X_BIT_ALMX_IF))
if (!(reg & MCP794XX_BIT_ALMX_IF))
goto out;
reg &= ~MCP7941X_BIT_ALMX_IF;
ret = i2c_smbus_write_byte_data(client, MCP7941X_REG_ALARM0_CTRL, reg);
reg &= ~MCP794XX_BIT_ALMX_IF;
ret = i2c_smbus_write_byte_data(client, MCP794XX_REG_ALARM0_CTRL, reg);
if (ret < 0)
goto out;
/* Disable alarm 0. */
reg = i2c_smbus_read_byte_data(client, MCP7941X_REG_CONTROL);
reg = i2c_smbus_read_byte_data(client, MCP794XX_REG_CONTROL);
if (reg < 0)
goto out;
reg &= ~MCP7941X_BIT_ALM0_EN;
ret = i2c_smbus_write_byte_data(client, MCP7941X_REG_CONTROL, reg);
reg &= ~MCP794XX_BIT_ALM0_EN;
ret = i2c_smbus_write_byte_data(client, MCP794XX_REG_CONTROL, reg);
if (ret < 0)
goto out;
@ -669,7 +670,7 @@ out:
mutex_unlock(&ds1307->rtc->ops_lock);
}
static int mcp7941x_read_alarm(struct device *dev, struct rtc_wkalrm *t)
static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct i2c_client *client = to_i2c_client(dev);
struct ds1307 *ds1307 = i2c_get_clientdata(client);
@ -680,11 +681,11 @@ static int mcp7941x_read_alarm(struct device *dev, struct rtc_wkalrm *t)
return -EINVAL;
/* Read control and alarm 0 registers. */
ret = ds1307->read_block_data(client, MCP7941X_REG_CONTROL, 10, regs);
ret = ds1307->read_block_data(client, MCP794XX_REG_CONTROL, 10, regs);
if (ret < 0)
return ret;
t->enabled = !!(regs[0] & MCP7941X_BIT_ALM0_EN);
t->enabled = !!(regs[0] & MCP794XX_BIT_ALM0_EN);
/* Report alarm 0 time assuming 24-hour and day-of-month modes. */
t->time.tm_sec = bcd2bin(ds1307->regs[3] & 0x7f);
@ -701,14 +702,14 @@ static int mcp7941x_read_alarm(struct device *dev, struct rtc_wkalrm *t)
"enabled=%d polarity=%d irq=%d match=%d\n", __func__,
t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
t->time.tm_wday, t->time.tm_mday, t->time.tm_mon, t->enabled,
!!(ds1307->regs[6] & MCP7941X_BIT_ALMX_POL),
!!(ds1307->regs[6] & MCP7941X_BIT_ALMX_IF),
(ds1307->regs[6] & MCP7941X_MSK_ALMX_MATCH) >> 4);
!!(ds1307->regs[6] & MCP794XX_BIT_ALMX_POL),
!!(ds1307->regs[6] & MCP794XX_BIT_ALMX_IF),
(ds1307->regs[6] & MCP794XX_MSK_ALMX_MATCH) >> 4);
return 0;
}
static int mcp7941x_set_alarm(struct device *dev, struct rtc_wkalrm *t)
static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct i2c_client *client = to_i2c_client(dev);
struct ds1307 *ds1307 = i2c_get_clientdata(client);
@ -725,7 +726,7 @@ static int mcp7941x_set_alarm(struct device *dev, struct rtc_wkalrm *t)
t->enabled, t->pending);
/* Read control and alarm 0 registers. */
ret = ds1307->read_block_data(client, MCP7941X_REG_CONTROL, 10, regs);
ret = ds1307->read_block_data(client, MCP794XX_REG_CONTROL, 10, regs);
if (ret < 0)
return ret;
@ -738,23 +739,23 @@ static int mcp7941x_set_alarm(struct device *dev, struct rtc_wkalrm *t)
regs[8] = bin2bcd(t->time.tm_mon) + 1;
/* Clear the alarm 0 interrupt flag. */
regs[6] &= ~MCP7941X_BIT_ALMX_IF;
regs[6] &= ~MCP794XX_BIT_ALMX_IF;
/* Set alarm match: second, minute, hour, day, date, month. */
regs[6] |= MCP7941X_MSK_ALMX_MATCH;
regs[6] |= MCP794XX_MSK_ALMX_MATCH;
if (t->enabled)
regs[0] |= MCP7941X_BIT_ALM0_EN;
regs[0] |= MCP794XX_BIT_ALM0_EN;
else
regs[0] &= ~MCP7941X_BIT_ALM0_EN;
regs[0] &= ~MCP794XX_BIT_ALM0_EN;
ret = ds1307->write_block_data(client, MCP7941X_REG_CONTROL, 10, regs);
ret = ds1307->write_block_data(client, MCP794XX_REG_CONTROL, 10, regs);
if (ret < 0)
return ret;
return 0;
}
static int mcp7941x_alarm_irq_enable(struct device *dev, unsigned int enabled)
static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct i2c_client *client = to_i2c_client(dev);
struct ds1307 *ds1307 = i2c_get_clientdata(client);
@ -763,24 +764,24 @@ static int mcp7941x_alarm_irq_enable(struct device *dev, unsigned int enabled)
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
reg = i2c_smbus_read_byte_data(client, MCP7941X_REG_CONTROL);
reg = i2c_smbus_read_byte_data(client, MCP794XX_REG_CONTROL);
if (reg < 0)
return reg;
if (enabled)
reg |= MCP7941X_BIT_ALM0_EN;
reg |= MCP794XX_BIT_ALM0_EN;
else
reg &= ~MCP7941X_BIT_ALM0_EN;
reg &= ~MCP794XX_BIT_ALM0_EN;
return i2c_smbus_write_byte_data(client, MCP7941X_REG_CONTROL, reg);
return i2c_smbus_write_byte_data(client, MCP794XX_REG_CONTROL, reg);
}
static const struct rtc_class_ops mcp7941x_rtc_ops = {
static const struct rtc_class_ops mcp794xx_rtc_ops = {
.read_time = ds1307_get_time,
.set_time = ds1307_set_time,
.read_alarm = mcp7941x_read_alarm,
.set_alarm = mcp7941x_set_alarm,
.alarm_irq_enable = mcp7941x_alarm_irq_enable,
.read_alarm = mcp794xx_read_alarm,
.set_alarm = mcp794xx_set_alarm,
.alarm_irq_enable = mcp794xx_alarm_irq_enable,
};
/*----------------------------------------------------------------------*/
@ -1049,10 +1050,10 @@ static int ds1307_probe(struct i2c_client *client,
case ds_1388:
ds1307->offset = 1; /* Seconds starts at 1 */
break;
case mcp7941x:
rtc_ops = &mcp7941x_rtc_ops;
case mcp794xx:
rtc_ops = &mcp794xx_rtc_ops;
if (ds1307->client->irq > 0 && chip->alarm) {
INIT_WORK(&ds1307->work, mcp7941x_work);
INIT_WORK(&ds1307->work, mcp794xx_work);
want_irq = true;
}
break;
@ -1117,18 +1118,18 @@ read_rtc:
dev_warn(&client->dev, "SET TIME!\n");
}
break;
case mcp7941x:
case mcp794xx:
/* make sure that the backup battery is enabled */
if (!(ds1307->regs[DS1307_REG_WDAY] & MCP7941X_BIT_VBATEN)) {
if (!(ds1307->regs[DS1307_REG_WDAY] & MCP794XX_BIT_VBATEN)) {
i2c_smbus_write_byte_data(client, DS1307_REG_WDAY,
ds1307->regs[DS1307_REG_WDAY]
| MCP7941X_BIT_VBATEN);
| MCP794XX_BIT_VBATEN);
}
/* clock halted? turn it on, so clock can tick. */
if (!(tmp & MCP7941X_BIT_ST)) {
if (!(tmp & MCP794XX_BIT_ST)) {
i2c_smbus_write_byte_data(client, DS1307_REG_SECS,
MCP7941X_BIT_ST);
MCP794XX_BIT_ST);
dev_warn(&client->dev, "SET TIME!\n");
goto read_rtc;
}

285
drivers/rtc/rtc-ds1374.c
View File

@ -4,6 +4,7 @@
* Based on code by Randy Vinson <rvinson@mvista.com>,
* which was based on the m41t00.c by Mark Greer <mgreer@mvista.com>.
*
* Copyright (C) 2014 Rose Technology
* Copyright (C) 2006-2007 Freescale Semiconductor
*
* 2005 (c) MontaVista Software, Inc. This file is licensed under
@ -26,6 +27,13 @@
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/pm.h>
#ifdef CONFIG_RTC_DRV_DS1374_WDT
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/miscdevice.h>
#include <linux/reboot.h>
#include <linux/watchdog.h>
#endif
#define DS1374_REG_TOD0 0x00 /* Time of Day */
#define DS1374_REG_TOD1 0x01
@ -49,6 +57,14 @@ static const struct i2c_device_id ds1374_id[] = {
};
MODULE_DEVICE_TABLE(i2c, ds1374_id);
#ifdef CONFIG_OF
static const struct of_device_id ds1374_of_match[] = {
{ .compatible = "dallas,ds1374" },
{ }
};
MODULE_DEVICE_TABLE(of, ds1374_of_match);
#endif
struct ds1374 {
struct i2c_client *client;
struct rtc_device *rtc;
@ -162,6 +178,7 @@ static int ds1374_set_time(struct device *dev, struct rtc_time *time)
return ds1374_write_rtc(client, itime, DS1374_REG_TOD0, 4);
}
#ifndef CONFIG_RTC_DRV_DS1374_WDT
/* The ds1374 has a decrementer for an alarm, rather than a comparator.
* If the time of day is changed, then the alarm will need to be
* reset.
@ -263,6 +280,7 @@ out:
mutex_unlock(&ds1374->mutex);
return ret;
}
#endif
static irqreturn_t ds1374_irq(int irq, void *dev_id)
{
@ -307,6 +325,7 @@ unlock:
mutex_unlock(&ds1374->mutex);
}
#ifndef CONFIG_RTC_DRV_DS1374_WDT
static int ds1374_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct i2c_client *client = to_i2c_client(dev);
@ -331,15 +350,260 @@ out:
mutex_unlock(&ds1374->mutex);
return ret;
}
#endif
static const struct rtc_class_ops ds1374_rtc_ops = {
.read_time = ds1374_read_time,
.set_time = ds1374_set_time,
#ifndef CONFIG_RTC_DRV_DS1374_WDT
.read_alarm = ds1374_read_alarm,
.set_alarm = ds1374_set_alarm,
.alarm_irq_enable = ds1374_alarm_irq_enable,
#endif
};
#ifdef CONFIG_RTC_DRV_DS1374_WDT
/*
*****************************************************************************
*
* Watchdog Driver
*
*****************************************************************************
*/
static struct i2c_client *save_client;
/* Default margin */
#define WD_TIMO 131762
#define DRV_NAME "DS1374 Watchdog"
static int wdt_margin = WD_TIMO;
static unsigned long wdt_is_open;
module_param(wdt_margin, int, 0);
MODULE_PARM_DESC(wdt_margin, "Watchdog timeout in seconds (default 32s)");
static const struct watchdog_info ds1374_wdt_info = {
.identity = "DS1374 WTD",
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
WDIOF_MAGICCLOSE,
};
static int ds1374_wdt_settimeout(unsigned int timeout)
{
int ret = -ENOIOCTLCMD;
int cr;
ret = cr = i2c_smbus_read_byte_data(save_client, DS1374_REG_CR);
if (ret < 0)
goto out;
/* Disable any existing watchdog/alarm before setting the new one */
cr &= ~DS1374_REG_CR_WACE;
ret = i2c_smbus_write_byte_data(save_client, DS1374_REG_CR, cr);
if (ret < 0)
goto out;
/* Set new watchdog time */
ret = ds1374_write_rtc(save_client, timeout, DS1374_REG_WDALM0, 3);
if (ret) {
pr_info("rtc-ds1374 - couldn't set new watchdog time\n");
goto out;
}
/* Enable watchdog timer */
cr |= DS1374_REG_CR_WACE | DS1374_REG_CR_WDALM;
cr &= ~DS1374_REG_CR_AIE;
ret = i2c_smbus_write_byte_data(save_client, DS1374_REG_CR, cr);
if (ret < 0)
goto out;
return 0;
out:
return ret;
}
/*
* Reload the watchdog timer. (ie, pat the watchdog)
*/
static void ds1374_wdt_ping(void)
{
u32 val;
int ret = 0;
ret = ds1374_read_rtc(save_client, &val, DS1374_REG_WDALM0, 3);
if (ret)
pr_info("WD TICK FAIL!!!!!!!!!! %i\n", ret);
}
static void ds1374_wdt_disable(void)
{
int ret = -ENOIOCTLCMD;
int cr;
cr = i2c_smbus_read_byte_data(save_client, DS1374_REG_CR);
/* Disable watchdog timer */
cr &= ~DS1374_REG_CR_WACE;
ret = i2c_smbus_write_byte_data(save_client, DS1374_REG_CR, cr);
}
/*
* Watchdog device is opened, and watchdog starts running.
*/
static int ds1374_wdt_open(struct inode *inode, struct file *file)
{
struct ds1374 *ds1374 = i2c_get_clientdata(save_client);
if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) {
mutex_lock(&ds1374->mutex);
if (test_and_set_bit(0, &wdt_is_open)) {
mutex_unlock(&ds1374->mutex);
return -EBUSY;
}
/*
* Activate
*/
wdt_is_open = 1;
mutex_unlock(&ds1374->mutex);
return nonseekable_open(inode, file);
}
return -ENODEV;
}
/*
* Close the watchdog device.
*/
static int ds1374_wdt_release(struct inode *inode, struct file *file)
{
if (MINOR(inode->i_rdev) == WATCHDOG_MINOR)
clear_bit(0, &wdt_is_open);
return 0;
}
/*
* Pat the watchdog whenever device is written to.
*/
static ssize_t ds1374_wdt_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos)
{
if (len) {
ds1374_wdt_ping();
return 1;
}
return 0;
}
static ssize_t ds1374_wdt_read(struct file *file, char __user *data,
size_t len, loff_t *ppos)
{
return 0;
}
/*
* Handle commands from user-space.
*/
static long ds1374_wdt_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
int new_margin, options;
switch (cmd) {
case WDIOC_GETSUPPORT:
return copy_to_user((struct watchdog_info __user *)arg,
&ds1374_wdt_info, sizeof(ds1374_wdt_info)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
return put_user(0, (int __user *)arg);
case WDIOC_KEEPALIVE:
ds1374_wdt_ping();
return 0;
case WDIOC_SETTIMEOUT:
if (get_user(new_margin, (int __user *)arg))
return -EFAULT;
if (new_margin < 1 || new_margin > 16777216)
return -EINVAL;
wdt_margin = new_margin;
ds1374_wdt_settimeout(new_margin);
ds1374_wdt_ping();
/* fallthrough */
case WDIOC_GETTIMEOUT:
return put_user(wdt_margin, (int __user *)arg);
case WDIOC_SETOPTIONS:
if (copy_from_user(&options, (int __user *)arg, sizeof(int)))
return -EFAULT;
if (options & WDIOS_DISABLECARD) {
pr_info("rtc-ds1374: disable watchdog\n");
ds1374_wdt_disable();
}
if (options & WDIOS_ENABLECARD) {
pr_info("rtc-ds1374: enable watchdog\n");
ds1374_wdt_settimeout(wdt_margin);
ds1374_wdt_ping();
}
return -EINVAL;
}
return -ENOTTY;
}
static long ds1374_wdt_unlocked_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
int ret;
struct ds1374 *ds1374 = i2c_get_clientdata(save_client);
mutex_lock(&ds1374->mutex);
ret = ds1374_wdt_ioctl(file, cmd, arg);
mutex_unlock(&ds1374->mutex);
return ret;
}
static int ds1374_wdt_notify_sys(struct notifier_block *this,
unsigned long code, void *unused)
{
if (code == SYS_DOWN || code == SYS_HALT)
/* Disable Watchdog */
ds1374_wdt_disable();
return NOTIFY_DONE;
}
static const struct file_operations ds1374_wdt_fops = {
.owner = THIS_MODULE,
.read = ds1374_wdt_read,
.unlocked_ioctl = ds1374_wdt_unlocked_ioctl,
.write = ds1374_wdt_write,
.open = ds1374_wdt_open,
.release = ds1374_wdt_release,
.llseek = no_llseek,
};
static struct miscdevice ds1374_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &ds1374_wdt_fops,
};
static struct notifier_block ds1374_wdt_notifier = {
.notifier_call = ds1374_wdt_notify_sys,
};
#endif /*CONFIG_RTC_DRV_DS1374_WDT*/
/*
*****************************************************************************
*
* Driver Interface
*
*****************************************************************************
*/
static int ds1374_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@ -378,12 +642,33 @@ static int ds1374_probe(struct i2c_client *client,
return PTR_ERR(ds1374->rtc);
}
#ifdef CONFIG_RTC_DRV_DS1374_WDT
save_client = client;
ret = misc_register(&ds1374_miscdev);
if (ret)
return ret;
ret = register_reboot_notifier(&ds1374_wdt_notifier);
if (ret) {
misc_deregister(&ds1374_miscdev);
return ret;
}
ds1374_wdt_settimeout(131072);
#endif
return 0;
}
static int ds1374_remove(struct i2c_client *client)
{
struct ds1374 *ds1374 = i2c_get_clientdata(client);
#ifdef CONFIG_RTC_DRV_DS1374_WDT
int res;
res = misc_deregister(&ds1374_miscdev);
if (!res)
ds1374_miscdev.parent = NULL;
unregister_reboot_notifier(&ds1374_wdt_notifier);
#endif
if (client->irq > 0) {
mutex_lock(&ds1374->mutex);

83
drivers/rtc/rtc-isl12057.c
View File

@ -41,6 +41,7 @@
#define ISL12057_REG_RTC_DW 0x03 /* Day of the Week */
#define ISL12057_REG_RTC_DT 0x04 /* Date */
#define ISL12057_REG_RTC_MO 0x05 /* Month */
#define ISL12057_REG_RTC_MO_CEN BIT(7) /* Century bit */
#define ISL12057_REG_RTC_YR 0x06 /* Year */
#define ISL12057_RTC_SEC_LEN 7
@ -88,7 +89,7 @@ static void isl12057_rtc_regs_to_tm(struct rtc_time *tm, u8 *regs)
tm->tm_min = bcd2bin(regs[ISL12057_REG_RTC_MN]);
if (regs[ISL12057_REG_RTC_HR] & ISL12057_REG_RTC_HR_MIL) { /* AM/PM */
tm->tm_hour = bcd2bin(regs[ISL12057_REG_RTC_HR] & 0x0f);
tm->tm_hour = bcd2bin(regs[ISL12057_REG_RTC_HR] & 0x1f);
if (regs[ISL12057_REG_RTC_HR] & ISL12057_REG_RTC_HR_PM)
tm->tm_hour += 12;
} else { /* 24 hour mode */
@ -97,26 +98,37 @@ static void isl12057_rtc_regs_to_tm(struct rtc_time *tm, u8 *regs)
tm->tm_mday = bcd2bin(regs[ISL12057_REG_RTC_DT]);
tm->tm_wday = bcd2bin(regs[ISL12057_REG_RTC_DW]) - 1; /* starts at 1 */
tm->tm_mon = bcd2bin(regs[ISL12057_REG_RTC_MO]) - 1; /* starts at 1 */
tm->tm_mon = bcd2bin(regs[ISL12057_REG_RTC_MO] & 0x1f) - 1; /* ditto */
tm->tm_year = bcd2bin(regs[ISL12057_REG_RTC_YR]) + 100;
/* Check if years register has overflown from 99 to 00 */
if (regs[ISL12057_REG_RTC_MO] & ISL12057_REG_RTC_MO_CEN)
tm->tm_year += 100;
}
static int isl12057_rtc_tm_to_regs(u8 *regs, struct rtc_time *tm)
{
u8 century_bit;
/*
* The clock has an 8 bit wide bcd-coded register for the year.
* It also has a century bit encoded in MO flag which provides
* information about overflow of year register from 99 to 00.
* tm_year is an offset from 1900 and we are interested in the
* 2000-2099 range, so any value less than 100 is invalid.
* 2000-2199 range, so any value less than 100 or larger than
* 299 is invalid.
*/
if (tm->tm_year < 100)
if (tm->tm_year < 100 || tm->tm_year > 299)
return -EINVAL;
century_bit = (tm->tm_year > 199) ? ISL12057_REG_RTC_MO_CEN : 0;
regs[ISL12057_REG_RTC_SC] = bin2bcd(tm->tm_sec);
regs[ISL12057_REG_RTC_MN] = bin2bcd(tm->tm_min);
regs[ISL12057_REG_RTC_HR] = bin2bcd(tm->tm_hour); /* 24-hour format */
regs[ISL12057_REG_RTC_DT] = bin2bcd(tm->tm_mday);
regs[ISL12057_REG_RTC_MO] = bin2bcd(tm->tm_mon + 1);
regs[ISL12057_REG_RTC_YR] = bin2bcd(tm->tm_year - 100);
regs[ISL12057_REG_RTC_MO] = bin2bcd(tm->tm_mon + 1) | century_bit;
regs[ISL12057_REG_RTC_YR] = bin2bcd(tm->tm_year % 100);
regs[ISL12057_REG_RTC_DW] = bin2bcd(tm->tm_wday + 1);
return 0;
@ -152,17 +164,33 @@ static int isl12057_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct isl12057_rtc_data *data = dev_get_drvdata(dev);
u8 regs[ISL12057_RTC_SEC_LEN];
unsigned int sr;
int ret;
mutex_lock(&data->lock);
ret = regmap_read(data->regmap, ISL12057_REG_SR, &sr);
if (ret) {
dev_err(dev, "%s: unable to read oscillator status flag (%d)\n",
__func__, ret);
goto out;
} else {
if (sr & ISL12057_REG_SR_OSF) {
ret = -ENODATA;
goto out;
}
}
ret = regmap_bulk_read(data->regmap, ISL12057_REG_RTC_SC, regs,
ISL12057_RTC_SEC_LEN);
if (ret)
dev_err(dev, "%s: unable to read RTC time section (%d)\n",
__func__, ret);
out:
mutex_unlock(&data->lock);
if (ret) {
dev_err(dev, "%s: RTC read failed\n", __func__);
if (ret)
return ret;
}
isl12057_rtc_regs_to_tm(tm, regs);
@ -182,10 +210,24 @@ static int isl12057_rtc_set_time(struct device *dev, struct rtc_time *tm)
mutex_lock(&data->lock);
ret = regmap_bulk_write(data->regmap, ISL12057_REG_RTC_SC, regs,
ISL12057_RTC_SEC_LEN);
mutex_unlock(&data->lock);
if (ret) {
dev_err(dev, "%s: unable to write RTC time section (%d)\n",
__func__, ret);
goto out;
}
if (ret)
dev_err(dev, "%s: RTC write failed\n", __func__);
/*
* Now that RTC time has been updated, let's clear oscillator
* failure flag, if needed.
*/
ret = regmap_update_bits(data->regmap, ISL12057_REG_SR,
ISL12057_REG_SR_OSF, 0);
if (ret < 0)
dev_err(dev, "%s: unable to clear osc. failure bit (%d)\n",
__func__, ret);
out:
mutex_unlock(&data->lock);
return ret;
}
@ -203,15 +245,8 @@ static int isl12057_check_rtc_status(struct device *dev, struct regmap *regmap)
ret = regmap_update_bits(regmap, ISL12057_REG_INT,
ISL12057_REG_INT_EOSC, 0);
if (ret < 0) {
dev_err(dev, "Unable to enable oscillator\n");
return ret;
}
/* Clear oscillator failure bit if needed */
ret = regmap_update_bits(regmap, ISL12057_REG_SR,
ISL12057_REG_SR_OSF, 0);
if (ret < 0) {
dev_err(dev, "Unable to clear oscillator failure bit\n");
dev_err(dev, "%s: unable to enable oscillator (%d)\n",
__func__, ret);
return ret;
}
@ -219,7 +254,8 @@ static int isl12057_check_rtc_status(struct device *dev, struct regmap *regmap)
ret = regmap_update_bits(regmap, ISL12057_REG_SR,
ISL12057_REG_SR_A1F, 0);
if (ret < 0) {
dev_err(dev, "Unable to clear alarm bit\n");
dev_err(dev, "%s: unable to clear alarm bit (%d)\n",
__func__, ret);
return ret;
}
@ -253,7 +289,8 @@ static int isl12057_probe(struct i2c_client *client,
regmap = devm_regmap_init_i2c(client, &isl12057_rtc_regmap_config);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(dev, "regmap allocation failed: %d\n", ret);
dev_err(dev, "%s: regmap allocation failed (%d)\n",
__func__, ret);
return ret;
}

571
drivers/rtc/rtc-omap.c
View File

@ -1,10 +1,11 @@
/*
* TI OMAP1 Real Time Clock interface for Linux
* TI OMAP Real Time Clock interface for Linux
*
* Copyright (C) 2003 MontaVista Software, Inc.
* Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com>
*
* Copyright (C) 2006 David Brownell (new RTC framework)
* Copyright (C) 2014 Johan Hovold <johan@kernel.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@ -25,7 +26,8 @@
#include <linux/pm_runtime.h>
#include <linux/io.h>
/* The OMAP1 RTC is a year/month/day/hours/minutes/seconds BCD clock
/*
* The OMAP RTC is a year/month/day/hours/minutes/seconds BCD clock
* with century-range alarm matching, driven by the 32kHz clock.
*
* The main user-visible ways it differs from PC RTCs are by omitting
@ -39,10 +41,6 @@
* the SoC). See the BOARD-SPECIFIC CUSTOMIZATION comment.
*/
#define DRIVER_NAME "omap_rtc"
#define OMAP_RTC_BASE 0xfffb4800
/* RTC registers */
#define OMAP_RTC_SECONDS_REG 0x00
#define OMAP_RTC_MINUTES_REG 0x04
@ -72,6 +70,15 @@
#define OMAP_RTC_IRQWAKEEN 0x7c
#define OMAP_RTC_ALARM2_SECONDS_REG 0x80
#define OMAP_RTC_ALARM2_MINUTES_REG 0x84
#define OMAP_RTC_ALARM2_HOURS_REG 0x88
#define OMAP_RTC_ALARM2_DAYS_REG 0x8c
#define OMAP_RTC_ALARM2_MONTHS_REG 0x90
#define OMAP_RTC_ALARM2_YEARS_REG 0x94
#define OMAP_RTC_PMIC_REG 0x98
/* OMAP_RTC_CTRL_REG bit fields: */
#define OMAP_RTC_CTRL_SPLIT BIT(7)
#define OMAP_RTC_CTRL_DISABLE BIT(6)
@ -84,6 +91,7 @@
/* OMAP_RTC_STATUS_REG bit fields: */
#define OMAP_RTC_STATUS_POWER_UP BIT(7)
#define OMAP_RTC_STATUS_ALARM2 BIT(7)
#define OMAP_RTC_STATUS_ALARM BIT(6)
#define OMAP_RTC_STATUS_1D_EVENT BIT(5)
#define OMAP_RTC_STATUS_1H_EVENT BIT(4)
@ -93,6 +101,7 @@
#define OMAP_RTC_STATUS_BUSY BIT(0)
/* OMAP_RTC_INTERRUPTS_REG bit fields: */
#define OMAP_RTC_INTERRUPTS_IT_ALARM2 BIT(4)
#define OMAP_RTC_INTERRUPTS_IT_ALARM BIT(3)
#define OMAP_RTC_INTERRUPTS_IT_TIMER BIT(2)
@ -102,61 +111,82 @@
/* OMAP_RTC_IRQWAKEEN bit fields: */
#define OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN BIT(1)
/* OMAP_RTC_PMIC bit fields: */
#define OMAP_RTC_PMIC_POWER_EN_EN BIT(16)
/* OMAP_RTC_KICKER values */
#define KICK0_VALUE 0x83e70b13
#define KICK1_VALUE 0x95a4f1e0
#define OMAP_RTC_HAS_KICKER BIT(0)
struct omap_rtc_device_type {
bool has_32kclk_en;
bool has_kicker;
bool has_irqwakeen;
bool has_pmic_mode;
bool has_power_up_reset;
};
struct omap_rtc {
struct rtc_device *rtc;
void __iomem *base;
int irq_alarm;
int irq_timer;
u8 interrupts_reg;
bool is_pmic_controller;
const struct omap_rtc_device_type *type;
};
static inline u8 rtc_read(struct omap_rtc *rtc, unsigned int reg)
{
return readb(rtc->base + reg);
}
static inline u32 rtc_readl(struct omap_rtc *rtc, unsigned int reg)
{
return readl(rtc->base + reg);
}
static inline void rtc_write(struct omap_rtc *rtc, unsigned int reg, u8 val)
{
writeb(val, rtc->base + reg);
}
static inline void rtc_writel(struct omap_rtc *rtc, unsigned int reg, u32 val)
{
writel(val, rtc->base + reg);
}
/*
* Few RTC IP revisions has special WAKE-EN Register to enable Wakeup
* generation for event Alarm.
*/
#define OMAP_RTC_HAS_IRQWAKEEN BIT(1)
/*
* Some RTC IP revisions (like those in AM335x and DRA7x) need
* the 32KHz clock to be explicitly enabled.
*/
#define OMAP_RTC_HAS_32KCLK_EN BIT(2)
static void __iomem *rtc_base;
#define rtc_read(addr) readb(rtc_base + (addr))
#define rtc_write(val, addr) writeb(val, rtc_base + (addr))
#define rtc_writel(val, addr) writel(val, rtc_base + (addr))
/* we rely on the rtc framework to handle locking (rtc->ops_lock),
* We rely on the rtc framework to handle locking (rtc->ops_lock),
* so the only other requirement is that register accesses which
* require BUSY to be clear are made with IRQs locally disabled
*/
static void rtc_wait_not_busy(void)
static void rtc_wait_not_busy(struct omap_rtc *rtc)
{
int count = 0;
u8 status;
int count;
u8 status;
/* BUSY may stay active for 1/32768 second (~30 usec) */
for (count = 0; count < 50; count++) {
status = rtc_read(OMAP_RTC_STATUS_REG);
if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0)
status = rtc_read(rtc, OMAP_RTC_STATUS_REG);
if (!(status & OMAP_RTC_STATUS_BUSY))
break;
udelay(1);
}
/* now we have ~15 usec to read/write various registers */
}
static irqreturn_t rtc_irq(int irq, void *rtc)
static irqreturn_t rtc_irq(int irq, void *dev_id)
{
unsigned long events = 0;
u8 irq_data;
struct omap_rtc *rtc = dev_id;
unsigned long events = 0;
u8 irq_data;
irq_data = rtc_read(OMAP_RTC_STATUS_REG);
irq_data = rtc_read(rtc, OMAP_RTC_STATUS_REG);
/* alarm irq? */
if (irq_data & OMAP_RTC_STATUS_ALARM) {
rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
rtc_write(rtc, OMAP_RTC_STATUS_REG, OMAP_RTC_STATUS_ALARM);
events |= RTC_IRQF | RTC_AF;
}
@ -164,23 +194,21 @@ static irqreturn_t rtc_irq(int irq, void *rtc)
if (irq_data & OMAP_RTC_STATUS_1S_EVENT)
events |= RTC_IRQF | RTC_UF;
rtc_update_irq(rtc, 1, events);
rtc_update_irq(rtc->rtc, 1, events);
return IRQ_HANDLED;
}
static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct omap_rtc *rtc = dev_get_drvdata(dev);
u8 reg, irqwake_reg = 0;
struct platform_device *pdev = to_platform_device(dev);
const struct platform_device_id *id_entry =
platform_get_device_id(pdev);
local_irq_disable();
rtc_wait_not_busy();
reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
rtc_wait_not_busy(rtc);
reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
if (rtc->type->has_irqwakeen)
irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN);
if (enabled) {
reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
@ -189,10 +217,10 @@ static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
}
rtc_wait_not_busy();
rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
rtc_wait_not_busy(rtc);
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg);
if (rtc->type->has_irqwakeen)
rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg);
local_irq_enable();
return 0;
@ -230,39 +258,47 @@ static void bcd2tm(struct rtc_time *tm)
tm->tm_year = bcd2bin(tm->tm_year) + 100;
}
static void omap_rtc_read_time_raw(struct omap_rtc *rtc, struct rtc_time *tm)
{
tm->tm_sec = rtc_read(rtc, OMAP_RTC_SECONDS_REG);
tm->tm_min = rtc_read(rtc, OMAP_RTC_MINUTES_REG);
tm->tm_hour = rtc_read(rtc, OMAP_RTC_HOURS_REG);
tm->tm_mday = rtc_read(rtc, OMAP_RTC_DAYS_REG);
tm->tm_mon = rtc_read(rtc, OMAP_RTC_MONTHS_REG);
tm->tm_year = rtc_read(rtc, OMAP_RTC_YEARS_REG);
}
static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct omap_rtc *rtc = dev_get_drvdata(dev);
/* we don't report wday/yday/isdst ... */
local_irq_disable();
rtc_wait_not_busy();
tm->tm_sec = rtc_read(OMAP_RTC_SECONDS_REG);
tm->tm_min = rtc_read(OMAP_RTC_MINUTES_REG);
tm->tm_hour = rtc_read(OMAP_RTC_HOURS_REG);
tm->tm_mday = rtc_read(OMAP_RTC_DAYS_REG);
tm->tm_mon = rtc_read(OMAP_RTC_MONTHS_REG);
tm->tm_year = rtc_read(OMAP_RTC_YEARS_REG);
rtc_wait_not_busy(rtc);
omap_rtc_read_time_raw(rtc, tm);
local_irq_enable();
bcd2tm(tm);
return 0;
}
static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct omap_rtc *rtc = dev_get_drvdata(dev);
if (tm2bcd(tm) < 0)
return -EINVAL;
local_irq_disable();
rtc_wait_not_busy();
rtc_write(tm->tm_year, OMAP_RTC_YEARS_REG);
rtc_write(tm->tm_mon, OMAP_RTC_MONTHS_REG);
rtc_write(tm->tm_mday, OMAP_RTC_DAYS_REG);
rtc_write(tm->tm_hour, OMAP_RTC_HOURS_REG);
rtc_write(tm->tm_min, OMAP_RTC_MINUTES_REG);
rtc_write(tm->tm_sec, OMAP_RTC_SECONDS_REG);
local_irq_disable();
rtc_wait_not_busy(rtc);
rtc_write(rtc, OMAP_RTC_YEARS_REG, tm->tm_year);
rtc_write(rtc, OMAP_RTC_MONTHS_REG, tm->tm_mon);
rtc_write(rtc, OMAP_RTC_DAYS_REG, tm->tm_mday);
rtc_write(rtc, OMAP_RTC_HOURS_REG, tm->tm_hour);
rtc_write(rtc, OMAP_RTC_MINUTES_REG, tm->tm_min);
rtc_write(rtc, OMAP_RTC_SECONDS_REG, tm->tm_sec);
local_irq_enable();
@ -271,48 +307,50 @@ static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
local_irq_disable();
rtc_wait_not_busy();
struct omap_rtc *rtc = dev_get_drvdata(dev);
u8 interrupts;
alm->time.tm_sec = rtc_read(OMAP_RTC_ALARM_SECONDS_REG);
alm->time.tm_min = rtc_read(OMAP_RTC_ALARM_MINUTES_REG);
alm->time.tm_hour = rtc_read(OMAP_RTC_ALARM_HOURS_REG);
alm->time.tm_mday = rtc_read(OMAP_RTC_ALARM_DAYS_REG);
alm->time.tm_mon = rtc_read(OMAP_RTC_ALARM_MONTHS_REG);
alm->time.tm_year = rtc_read(OMAP_RTC_ALARM_YEARS_REG);
local_irq_disable();
rtc_wait_not_busy(rtc);
alm->time.tm_sec = rtc_read(rtc, OMAP_RTC_ALARM_SECONDS_REG);
alm->time.tm_min = rtc_read(rtc, OMAP_RTC_ALARM_MINUTES_REG);
alm->time.tm_hour = rtc_read(rtc, OMAP_RTC_ALARM_HOURS_REG);
alm->time.tm_mday = rtc_read(rtc, OMAP_RTC_ALARM_DAYS_REG);
alm->time.tm_mon = rtc_read(rtc, OMAP_RTC_ALARM_MONTHS_REG);
alm->time.tm_year = rtc_read(rtc, OMAP_RTC_ALARM_YEARS_REG);
local_irq_enable();
bcd2tm(&alm->time);
alm->enabled = !!(rtc_read(OMAP_RTC_INTERRUPTS_REG)
& OMAP_RTC_INTERRUPTS_IT_ALARM);
interrupts = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
alm->enabled = !!(interrupts & OMAP_RTC_INTERRUPTS_IT_ALARM);
return 0;
}
static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
struct omap_rtc *rtc = dev_get_drvdata(dev);
u8 reg, irqwake_reg = 0;
struct platform_device *pdev = to_platform_device(dev);
const struct platform_device_id *id_entry =
platform_get_device_id(pdev);
if (tm2bcd(&alm->time) < 0)
return -EINVAL;
local_irq_disable();
rtc_wait_not_busy();
rtc_wait_not_busy(rtc);
rtc_write(alm->time.tm_year, OMAP_RTC_ALARM_YEARS_REG);
rtc_write(alm->time.tm_mon, OMAP_RTC_ALARM_MONTHS_REG);
rtc_write(alm->time.tm_mday, OMAP_RTC_ALARM_DAYS_REG);
rtc_write(alm->time.tm_hour, OMAP_RTC_ALARM_HOURS_REG);
rtc_write(alm->time.tm_min, OMAP_RTC_ALARM_MINUTES_REG);
rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
rtc_write(rtc, OMAP_RTC_ALARM_YEARS_REG, alm->time.tm_year);
rtc_write(rtc, OMAP_RTC_ALARM_MONTHS_REG, alm->time.tm_mon);
rtc_write(rtc, OMAP_RTC_ALARM_DAYS_REG, alm->time.tm_mday);
rtc_write(rtc, OMAP_RTC_ALARM_HOURS_REG, alm->time.tm_hour);
rtc_write(rtc, OMAP_RTC_ALARM_MINUTES_REG, alm->time.tm_min);
rtc_write(rtc, OMAP_RTC_ALARM_SECONDS_REG, alm->time.tm_sec);
reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
if (rtc->type->has_irqwakeen)
irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN);
if (alm->enabled) {
reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
@ -321,15 +359,79 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
}
rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg);
if (rtc->type->has_irqwakeen)
rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg);
local_irq_enable();
return 0;
}
static struct omap_rtc *omap_rtc_power_off_rtc;
/*
* omap_rtc_poweroff: RTC-controlled power off
*
* The RTC can be used to control an external PMIC via the pmic_power_en pin,
* which can be configured to transition to OFF on ALARM2 events.
*
* Notes:
* The two-second alarm offset is the shortest offset possible as the alarm
* registers must be set before the next timer update and the offset
* calculation is too heavy for everything to be done within a single access
* period (~15 us).
*
* Called with local interrupts disabled.
*/
static void omap_rtc_power_off(void)
{
struct omap_rtc *rtc = omap_rtc_power_off_rtc;
struct rtc_time tm;
unsigned long now;
u32 val;
/* enable pmic_power_en control */
val = rtc_readl(rtc, OMAP_RTC_PMIC_REG);
rtc_writel(rtc, OMAP_RTC_PMIC_REG, val | OMAP_RTC_PMIC_POWER_EN_EN);
/* set alarm two seconds from now */
omap_rtc_read_time_raw(rtc, &tm);
bcd2tm(&tm);
rtc_tm_to_time(&tm, &now);
rtc_time_to_tm(now + 2, &tm);
if (tm2bcd(&tm) < 0) {
dev_err(&rtc->rtc->dev, "power off failed\n");
return;
}
rtc_wait_not_busy(rtc);
rtc_write(rtc, OMAP_RTC_ALARM2_SECONDS_REG, tm.tm_sec);
rtc_write(rtc, OMAP_RTC_ALARM2_MINUTES_REG, tm.tm_min);
rtc_write(rtc, OMAP_RTC_ALARM2_HOURS_REG, tm.tm_hour);
rtc_write(rtc, OMAP_RTC_ALARM2_DAYS_REG, tm.tm_mday);
rtc_write(rtc, OMAP_RTC_ALARM2_MONTHS_REG, tm.tm_mon);
rtc_write(rtc, OMAP_RTC_ALARM2_YEARS_REG, tm.tm_year);
/*
* enable ALARM2 interrupt
*
* NOTE: this fails on AM3352 if rtc_write (writeb) is used
*/
val = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
rtc_writel(rtc, OMAP_RTC_INTERRUPTS_REG,
val | OMAP_RTC_INTERRUPTS_IT_ALARM2);
/*
* Wait for alarm to trigger (within two seconds) and external PMIC to
* power off the system. Add a 500 ms margin for external latencies
* (e.g. debounce circuits).
*/
mdelay(2500);
}
static struct rtc_class_ops omap_rtc_ops = {
.read_time = omap_rtc_read_time,
.set_time = omap_rtc_set_time,
@ -338,137 +440,140 @@ static struct rtc_class_ops omap_rtc_ops = {
.alarm_irq_enable = omap_rtc_alarm_irq_enable,
};
static int omap_rtc_alarm;
static int omap_rtc_timer;
#define OMAP_RTC_DATA_AM3352_IDX 1
#define OMAP_RTC_DATA_DA830_IDX 2
static struct platform_device_id omap_rtc_devtype[] = {
{
.name = DRIVER_NAME,
},
[OMAP_RTC_DATA_AM3352_IDX] = {
.name = "am3352-rtc",
.driver_data = OMAP_RTC_HAS_KICKER | OMAP_RTC_HAS_IRQWAKEEN |
OMAP_RTC_HAS_32KCLK_EN,
},
[OMAP_RTC_DATA_DA830_IDX] = {
.name = "da830-rtc",
.driver_data = OMAP_RTC_HAS_KICKER,
},
{},
static const struct omap_rtc_device_type omap_rtc_default_type = {
.has_power_up_reset = true,
};
MODULE_DEVICE_TABLE(platform, omap_rtc_devtype);
static const struct omap_rtc_device_type omap_rtc_am3352_type = {
.has_32kclk_en = true,
.has_kicker = true,
.has_irqwakeen = true,
.has_pmic_mode = true,
};
static const struct omap_rtc_device_type omap_rtc_da830_type = {
.has_kicker = true,
};
static const struct platform_device_id omap_rtc_id_table[] = {
{
.name = "omap_rtc",
.driver_data = (kernel_ulong_t)&omap_rtc_default_type,
}, {
.name = "am3352-rtc",
.driver_data = (kernel_ulong_t)&omap_rtc_am3352_type,
}, {
.name = "da830-rtc",
.driver_data = (kernel_ulong_t)&omap_rtc_da830_type,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(platform, omap_rtc_id_table);
static const struct of_device_id omap_rtc_of_match[] = {
{ .compatible = "ti,da830-rtc",
.data = &omap_rtc_devtype[OMAP_RTC_DATA_DA830_IDX],
},
{ .compatible = "ti,am3352-rtc",
.data = &omap_rtc_devtype[OMAP_RTC_DATA_AM3352_IDX],
},
{},
{
.compatible = "ti,am3352-rtc",
.data = &omap_rtc_am3352_type,
}, {
.compatible = "ti,da830-rtc",
.data = &omap_rtc_da830_type,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
static int __init omap_rtc_probe(struct platform_device *pdev)
{
struct resource *res;
struct rtc_device *rtc;
u8 reg, new_ctrl;
struct omap_rtc *rtc;
struct resource *res;
u8 reg, mask, new_ctrl;
const struct platform_device_id *id_entry;
const struct of_device_id *of_id;
int ret;
rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
if (!rtc)
return -ENOMEM;
of_id = of_match_device(omap_rtc_of_match, &pdev->dev);
if (of_id)
pdev->id_entry = of_id->data;
id_entry = platform_get_device_id(pdev);
if (!id_entry) {
dev_err(&pdev->dev, "no matching device entry\n");
return -ENODEV;
if (of_id) {
rtc->type = of_id->data;
rtc->is_pmic_controller = rtc->type->has_pmic_mode &&
of_property_read_bool(pdev->dev.of_node,
"system-power-controller");
} else {
id_entry = platform_get_device_id(pdev);
rtc->type = (void *)id_entry->driver_data;
}
omap_rtc_timer = platform_get_irq(pdev, 0);
if (omap_rtc_timer <= 0) {
pr_debug("%s: no update irq?\n", pdev->name);
rtc->irq_timer = platform_get_irq(pdev, 0);
if (rtc->irq_timer <= 0)
return -ENOENT;
}
omap_rtc_alarm = platform_get_irq(pdev, 1);
if (omap_rtc_alarm <= 0) {
pr_debug("%s: no alarm irq?\n", pdev->name);
rtc->irq_alarm = platform_get_irq(pdev, 1);
if (rtc->irq_alarm <= 0)
return -ENOENT;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
rtc_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(rtc_base))
return PTR_ERR(rtc_base);
rtc->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(rtc->base))
return PTR_ERR(rtc->base);
platform_set_drvdata(pdev, rtc);
/* Enable the clock/module so that we can access the registers */
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
if (id_entry->driver_data & OMAP_RTC_HAS_KICKER) {
rtc_writel(KICK0_VALUE, OMAP_RTC_KICK0_REG);
rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG);
if (rtc->type->has_kicker) {
rtc_writel(rtc, OMAP_RTC_KICK0_REG, KICK0_VALUE);
rtc_writel(rtc, OMAP_RTC_KICK1_REG, KICK1_VALUE);
}
rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&omap_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc)) {
pr_debug("%s: can't register RTC device, err %ld\n",
pdev->name, PTR_ERR(rtc));
goto fail0;
}
platform_set_drvdata(pdev, rtc);
/* clear pending irqs, and set 1/second periodic,
* which we'll use instead of update irqs
/*
* disable interrupts
*
* NOTE: ALARM2 is not cleared on AM3352 if rtc_write (writeb) is used
*/
rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
rtc_writel(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
/* enable RTC functional clock */
if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN)
rtc_writel(OMAP_RTC_OSC_32KCLK_EN, OMAP_RTC_OSC_REG);
if (rtc->type->has_32kclk_en) {
reg = rtc_read(rtc, OMAP_RTC_OSC_REG);
rtc_writel(rtc, OMAP_RTC_OSC_REG,
reg | OMAP_RTC_OSC_32KCLK_EN);
}
/* clear old status */
reg = rtc_read(OMAP_RTC_STATUS_REG);
if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) {
pr_info("%s: RTC power up reset detected\n",
pdev->name);
rtc_write(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG);
}
if (reg & (u8) OMAP_RTC_STATUS_ALARM)
rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
reg = rtc_read(rtc, OMAP_RTC_STATUS_REG);
/* handle periodic and alarm irqs */
if (devm_request_irq(&pdev->dev, omap_rtc_timer, rtc_irq, 0,
dev_name(&rtc->dev), rtc)) {
pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n",
pdev->name, omap_rtc_timer);
goto fail0;
}
if ((omap_rtc_timer != omap_rtc_alarm) &&
(devm_request_irq(&pdev->dev, omap_rtc_alarm, rtc_irq, 0,
dev_name(&rtc->dev), rtc))) {
pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n",
pdev->name, omap_rtc_alarm);
goto fail0;
mask = OMAP_RTC_STATUS_ALARM;
if (rtc->type->has_pmic_mode)
mask |= OMAP_RTC_STATUS_ALARM2;
if (rtc->type->has_power_up_reset) {
mask |= OMAP_RTC_STATUS_POWER_UP;
if (reg & OMAP_RTC_STATUS_POWER_UP)
dev_info(&pdev->dev, "RTC power up reset detected\n");
}
if (reg & mask)
rtc_write(rtc, OMAP_RTC_STATUS_REG, reg & mask);
/* On boards with split power, RTC_ON_NOFF won't reset the RTC */
reg = rtc_read(OMAP_RTC_CTRL_REG);
if (reg & (u8) OMAP_RTC_CTRL_STOP)
pr_info("%s: already running\n", pdev->name);
reg = rtc_read(rtc, OMAP_RTC_CTRL_REG);
if (reg & OMAP_RTC_CTRL_STOP)
dev_info(&pdev->dev, "already running\n");
/* force to 24 hour mode */
new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT | OMAP_RTC_CTRL_AUTO_COMP);
new_ctrl |= OMAP_RTC_CTRL_STOP;
/* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
/*
* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
*
* - Device wake-up capability setting should come through chip
* init logic. OMAP1 boards should initialize the "wakeup capable"
@ -482,36 +587,70 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
* is write-only, and always reads as zero...)
*/
device_init_wakeup(&pdev->dev, true);
if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT)
pr_info("%s: split power mode\n", pdev->name);
if (new_ctrl & OMAP_RTC_CTRL_SPLIT)
dev_info(&pdev->dev, "split power mode\n");
if (reg != new_ctrl)
rtc_write(new_ctrl, OMAP_RTC_CTRL_REG);
rtc_write(rtc, OMAP_RTC_CTRL_REG, new_ctrl);
device_init_wakeup(&pdev->dev, true);
rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&omap_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc->rtc)) {
ret = PTR_ERR(rtc->rtc);
goto err;
}
/* handle periodic and alarm irqs */
ret = devm_request_irq(&pdev->dev, rtc->irq_timer, rtc_irq, 0,
dev_name(&rtc->rtc->dev), rtc);
if (ret)
goto err;
if (rtc->irq_timer != rtc->irq_alarm) {
ret = devm_request_irq(&pdev->dev, rtc->irq_alarm, rtc_irq, 0,
dev_name(&rtc->rtc->dev), rtc);
if (ret)
goto err;
}
if (rtc->is_pmic_controller) {
if (!pm_power_off) {
omap_rtc_power_off_rtc = rtc;
pm_power_off = omap_rtc_power_off;
}
}
return 0;
fail0:
if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
rtc_writel(0, OMAP_RTC_KICK0_REG);
err:
device_init_wakeup(&pdev->dev, false);
if (rtc->type->has_kicker)
rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return -EIO;
return ret;
}
static int __exit omap_rtc_remove(struct platform_device *pdev)
{
const struct platform_device_id *id_entry =
platform_get_device_id(pdev);
struct omap_rtc *rtc = platform_get_drvdata(pdev);
if (pm_power_off == omap_rtc_power_off &&
omap_rtc_power_off_rtc == rtc) {
pm_power_off = NULL;
omap_rtc_power_off_rtc = NULL;
}
device_init_wakeup(&pdev->dev, 0);
/* leave rtc running, but disable irqs */
rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
rtc_writel(0, OMAP_RTC_KICK0_REG);
if (rtc->type->has_kicker)
rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0);
/* Disable the clock/module */
pm_runtime_put_sync(&pdev->dev);
@ -521,20 +660,21 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM_SLEEP
static u8 irqstat;
static int omap_rtc_suspend(struct device *dev)
{
irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
struct omap_rtc *rtc = dev_get_drvdata(dev);
/* FIXME the RTC alarm is not currently acting as a wakeup event
rtc->interrupts_reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
/*
* FIXME: the RTC alarm is not currently acting as a wakeup event
* source on some platforms, and in fact this enable() call is just
* saving a flag that's never used...
*/
if (device_may_wakeup(dev))
enable_irq_wake(omap_rtc_alarm);
enable_irq_wake(rtc->irq_alarm);
else
rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
/* Disable the clock/module */
pm_runtime_put_sync(dev);
@ -544,13 +684,15 @@ static int omap_rtc_suspend(struct device *dev)
static int omap_rtc_resume(struct device *dev)
{
struct omap_rtc *rtc = dev_get_drvdata(dev);
/* Enable the clock/module so that we can access the registers */
pm_runtime_get_sync(dev);
if (device_may_wakeup(dev))
disable_irq_wake(omap_rtc_alarm);
disable_irq_wake(rtc->irq_alarm);
else
rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, rtc->interrupts_reg);
return 0;
}
@ -560,23 +702,32 @@ static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume);
static void omap_rtc_shutdown(struct platform_device *pdev)
{
rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
struct omap_rtc *rtc = platform_get_drvdata(pdev);
u8 mask;
/*
* Keep the ALARM interrupt enabled to allow the system to power up on
* alarm events.
*/
mask = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
mask &= OMAP_RTC_INTERRUPTS_IT_ALARM;
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, mask);
}
MODULE_ALIAS("platform:omap_rtc");
static struct platform_driver omap_rtc_driver = {
.remove = __exit_p(omap_rtc_remove),
.shutdown = omap_rtc_shutdown,
.driver = {
.name = DRIVER_NAME,
.name = "omap_rtc",
.owner = THIS_MODULE,
.pm = &omap_rtc_pm_ops,
.of_match_table = omap_rtc_of_match,
},
.id_table = omap_rtc_devtype,
.id_table = omap_rtc_id_table,
};
module_platform_driver_probe(omap_rtc_driver, omap_rtc_probe);
MODULE_ALIAS("platform:omap_rtc");
MODULE_AUTHOR("George G. Davis (and others)");
MODULE_LICENSE("GPL");

55
drivers/rtc/rtc-pcf8563.c
View File

@ -28,6 +28,7 @@
#define PCF8563_REG_ST2 0x01
#define PCF8563_BIT_AIE (1 << 1)
#define PCF8563_BIT_AF (1 << 3)
#define PCF8563_BITS_ST2_N (7 << 5)
#define PCF8563_REG_SC 0x02 /* datetime */
#define PCF8563_REG_MN 0x03
@ -41,6 +42,13 @@
#define PCF8563_REG_CLKO 0x0D /* clock out */
#define PCF8563_REG_TMRC 0x0E /* timer control */
#define PCF8563_TMRC_ENABLE BIT(7)
#define PCF8563_TMRC_4096 0
#define PCF8563_TMRC_64 1
#define PCF8563_TMRC_1 2
#define PCF8563_TMRC_1_60 3
#define PCF8563_TMRC_MASK 3
#define PCF8563_REG_TMR 0x0F /* timer */
#define PCF8563_SC_LV 0x80 /* low voltage */
@ -118,22 +126,21 @@ static int pcf8563_write_block_data(struct i2c_client *client,
static int pcf8563_set_alarm_mode(struct i2c_client *client, bool on)
{
unsigned char buf[2];
unsigned char buf;
int err;
err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, buf + 1);
err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, &buf);
if (err < 0)
return err;
if (on)
buf[1] |= PCF8563_BIT_AIE;
buf |= PCF8563_BIT_AIE;
else
buf[1] &= ~PCF8563_BIT_AIE;
buf &= ~PCF8563_BIT_AIE;
buf[1] &= ~PCF8563_BIT_AF;
buf[0] = PCF8563_REG_ST2;
buf &= ~(PCF8563_BIT_AF | PCF8563_BITS_ST2_N);
err = pcf8563_write_block_data(client, PCF8563_REG_ST2, 1, buf + 1);
err = pcf8563_write_block_data(client, PCF8563_REG_ST2, 1, &buf);
if (err < 0) {
dev_err(&client->dev, "%s: write error\n", __func__);
return -EIO;
@ -336,8 +343,8 @@ static int pcf8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm)
__func__, buf[0], buf[1], buf[2], buf[3]);
tm->time.tm_min = bcd2bin(buf[0] & 0x7F);
tm->time.tm_hour = bcd2bin(buf[1] & 0x7F);
tm->time.tm_mday = bcd2bin(buf[2] & 0x1F);
tm->time.tm_hour = bcd2bin(buf[1] & 0x3F);
tm->time.tm_mday = bcd2bin(buf[2] & 0x3F);
tm->time.tm_wday = bcd2bin(buf[3] & 0x7);
tm->time.tm_mon = -1;
tm->time.tm_year = -1;
@ -361,6 +368,14 @@ static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm)
struct i2c_client *client = to_i2c_client(dev);
unsigned char buf[4];
int err;
unsigned long alarm_time;
/* The alarm has no seconds, round up to nearest minute */
if (tm->time.tm_sec) {
rtc_tm_to_time(&tm->time, &alarm_time);
alarm_time += 60-tm->time.tm_sec;
rtc_time_to_tm(alarm_time, &tm->time);
}
dev_dbg(dev, "%s, min=%d hour=%d wday=%d mday=%d "
"enabled=%d pending=%d\n", __func__,
@ -381,6 +396,7 @@ static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm)
static int pcf8563_irq_enable(struct device *dev, unsigned int enabled)
{
dev_dbg(dev, "%s: en=%d\n", __func__, enabled);
return pcf8563_set_alarm_mode(to_i2c_client(dev), !!enabled);
}
@ -398,6 +414,8 @@ static int pcf8563_probe(struct i2c_client *client,
{
struct pcf8563 *pcf8563;
int err;
unsigned char buf;
unsigned char alm_pending;
dev_dbg(&client->dev, "%s\n", __func__);
@ -415,6 +433,22 @@ static int pcf8563_probe(struct i2c_client *client,
pcf8563->client = client;
device_set_wakeup_capable(&client->dev, 1);
/* Set timer to lowest frequency to save power (ref Haoyu datasheet) */
buf = PCF8563_TMRC_1_60;
err = pcf8563_write_block_data(client, PCF8563_REG_TMRC, 1, &buf);
if (err < 0) {
dev_err(&client->dev, "%s: write error\n", __func__);
return err;
}
err = pcf8563_get_alarm_mode(client, NULL, &alm_pending);
if (err < 0) {
dev_err(&client->dev, "%s: read error\n", __func__);
return err;
}
if (alm_pending)
pcf8563_set_alarm_mode(client, 0);
pcf8563->rtc = devm_rtc_device_register(&client->dev,
pcf8563_driver.driver.name,
&pcf8563_rtc_ops, THIS_MODULE);
@ -435,6 +469,9 @@ static int pcf8563_probe(struct i2c_client *client,
}
/* the pcf8563 alarm only supports a minute accuracy */
pcf8563->rtc->uie_unsupported = 1;
return 0;
}

66
drivers/rtc/rtc-sirfsoc.c
View File

@ -47,6 +47,7 @@ struct sirfsoc_rtc_drv {
unsigned irq_wake;
/* Overflow for every 8 years extra time */
u32 overflow_rtc;
spinlock_t lock;
#ifdef CONFIG_PM
u32 saved_counter;
u32 saved_overflow_rtc;
@ -61,7 +62,7 @@ static int sirfsoc_rtc_read_alarm(struct device *dev,
rtcdrv = dev_get_drvdata(dev);
local_irq_disable();
spin_lock_irq(&rtcdrv->lock);
rtc_count = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN);
@ -84,7 +85,8 @@ static int sirfsoc_rtc_read_alarm(struct device *dev,
if (sirfsoc_rtc_iobrg_readl(
rtcdrv->rtc_base + RTC_STATUS) & SIRFSOC_RTC_AL0E)
alrm->enabled = 1;
local_irq_enable();
spin_unlock_irq(&rtcdrv->lock);
return 0;
}
@ -99,7 +101,7 @@ static int sirfsoc_rtc_set_alarm(struct device *dev,
if (alrm->enabled) {
rtc_tm_to_time(&(alrm->time), &rtc_alarm);
local_irq_disable();
spin_lock_irq(&rtcdrv->lock);
rtc_status_reg = sirfsoc_rtc_iobrg_readl(
rtcdrv->rtc_base + RTC_STATUS);
@ -123,14 +125,15 @@ static int sirfsoc_rtc_set_alarm(struct device *dev,
rtc_status_reg |= SIRFSOC_RTC_AL0E;
sirfsoc_rtc_iobrg_writel(
rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS);
local_irq_enable();
spin_unlock_irq(&rtcdrv->lock);
} else {
/*
* if this function was called with enabled=0
* then it could mean that the application is
* trying to cancel an ongoing alarm
*/
local_irq_disable();
spin_lock_irq(&rtcdrv->lock);
rtc_status_reg = sirfsoc_rtc_iobrg_readl(
rtcdrv->rtc_base + RTC_STATUS);
@ -146,7 +149,7 @@ static int sirfsoc_rtc_set_alarm(struct device *dev,
rtcdrv->rtc_base + RTC_STATUS);
}
local_irq_enable();
spin_unlock_irq(&rtcdrv->lock);
}
return 0;
@ -209,12 +212,38 @@ static int sirfsoc_rtc_ioctl(struct device *dev, unsigned int cmd,
}
}
static int sirfsoc_rtc_alarm_irq_enable(struct device *dev,
unsigned int enabled)
{
unsigned long rtc_status_reg = 0x0;
struct sirfsoc_rtc_drv *rtcdrv;
rtcdrv = dev_get_drvdata(dev);
spin_lock_irq(&rtcdrv->lock);
rtc_status_reg = sirfsoc_rtc_iobrg_readl(
rtcdrv->rtc_base + RTC_STATUS);
if (enabled)
rtc_status_reg |= SIRFSOC_RTC_AL0E;
else
rtc_status_reg &= ~SIRFSOC_RTC_AL0E;
sirfsoc_rtc_iobrg_writel(rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS);
spin_unlock_irq(&rtcdrv->lock);
return 0;
}
static const struct rtc_class_ops sirfsoc_rtc_ops = {
.read_time = sirfsoc_rtc_read_time,
.set_time = sirfsoc_rtc_set_time,
.read_alarm = sirfsoc_rtc_read_alarm,
.set_alarm = sirfsoc_rtc_set_alarm,
.ioctl = sirfsoc_rtc_ioctl
.ioctl = sirfsoc_rtc_ioctl,
.alarm_irq_enable = sirfsoc_rtc_alarm_irq_enable
};
static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata)
@ -223,6 +252,8 @@ static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata)
unsigned long rtc_status_reg = 0x0;
unsigned long events = 0x0;
spin_lock(&rtcdrv->lock);
rtc_status_reg = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_STATUS);
/* this bit will be set ONLY if an alarm was active
* and it expired NOW
@ -240,6 +271,9 @@ static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata)
rtc_status_reg &= ~(SIRFSOC_RTC_AL0E);
}
sirfsoc_rtc_iobrg_writel(rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS);
spin_unlock(&rtcdrv->lock);
/* this should wake up any apps polling/waiting on the read
* after setting the alarm
*/
@ -267,6 +301,8 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev)
if (rtcdrv == NULL)
return -ENOMEM;
spin_lock_init(&rtcdrv->lock);
err = of_property_read_u32(np, "reg", &rtcdrv->rtc_base);
if (err) {
dev_err(&pdev->dev, "unable to find base address of rtc node in dtb\n");
@ -286,14 +322,6 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev)
rtc_div = ((32768 / RTC_HZ) / 2) - 1;
sirfsoc_rtc_iobrg_writel(rtc_div, rtcdrv->rtc_base + RTC_DIV);
rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&sirfsoc_rtc_ops, THIS_MODULE);
if (IS_ERR(rtcdrv->rtc)) {
err = PTR_ERR(rtcdrv->rtc);
dev_err(&pdev->dev, "can't register RTC device\n");
return err;
}
/* 0x3 -> RTC_CLK */
sirfsoc_rtc_iobrg_writel(SIRFSOC_RTC_CLK,
rtcdrv->rtc_base + RTC_CLOCK_SWITCH);
@ -308,6 +336,14 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev)
rtcdrv->overflow_rtc =
sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_SW_VALUE);
rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&sirfsoc_rtc_ops, THIS_MODULE);
if (IS_ERR(rtcdrv->rtc)) {
err = PTR_ERR(rtcdrv->rtc);
dev_err(&pdev->dev, "can't register RTC device\n");
return err;
}
rtcdrv->irq = platform_get_irq(pdev, 0);
err = devm_request_irq(
&pdev->dev,

39
drivers/rtc/rtc-snvs.c
View File

@ -17,6 +17,7 @@
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/clk.h>
/* These register offsets are relative to LP (Low Power) range */
#define SNVS_LPCR 0x04
@ -39,6 +40,7 @@ struct snvs_rtc_data {
void __iomem *ioaddr;
int irq;
spinlock_t lock;
struct clk *clk;
};
static u32 rtc_read_lp_counter(void __iomem *ioaddr)
@ -260,6 +262,18 @@ static int snvs_rtc_probe(struct platform_device *pdev)
if (data->irq < 0)
return data->irq;
data->clk = devm_clk_get(&pdev->dev, "snvs-rtc");
if (IS_ERR(data->clk)) {
data->clk = NULL;
} else {
ret = clk_prepare_enable(data->clk);
if (ret) {
dev_err(&pdev->dev,
"Could not prepare or enable the snvs clock\n");
return ret;
}
}
platform_set_drvdata(pdev, data);
spin_lock_init(&data->lock);
@ -280,7 +294,7 @@ static int snvs_rtc_probe(struct platform_device *pdev)
if (ret) {
dev_err(&pdev->dev, "failed to request irq %d: %d\n",
data->irq, ret);
return ret;
goto error_rtc_device_register;
}
data->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
@ -288,10 +302,16 @@ static int snvs_rtc_probe(struct platform_device *pdev)
if (IS_ERR(data->rtc)) {
ret = PTR_ERR(data->rtc);
dev_err(&pdev->dev, "failed to register rtc: %d\n", ret);
return ret;
goto error_rtc_device_register;
}
return 0;
error_rtc_device_register:
if (data->clk)
clk_disable_unprepare(data->clk);
return ret;
}
#ifdef CONFIG_PM_SLEEP
@ -302,21 +322,34 @@ static int snvs_rtc_suspend(struct device *dev)
if (device_may_wakeup(dev))
enable_irq_wake(data->irq);
if (data->clk)
clk_disable_unprepare(data->clk);
return 0;
}
static int snvs_rtc_resume(struct device *dev)
{
struct snvs_rtc_data *data = dev_get_drvdata(dev);
int ret;
if (device_may_wakeup(dev))
disable_irq_wake(data->irq);
if (data->clk) {
ret = clk_prepare_enable(data->clk);
if (ret)
return ret;
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(snvs_rtc_pm_ops, snvs_rtc_suspend, snvs_rtc_resume);
static const struct dev_pm_ops snvs_rtc_pm_ops = {
.suspend_noirq = snvs_rtc_suspend,
.resume_noirq = snvs_rtc_resume,
};
static const struct of_device_id snvs_dt_ids[] = {
{ .compatible = "fsl,sec-v4.0-mon-rtc-lp", },

2
drivers/usb/storage/debug.c
View File

@ -188,7 +188,7 @@ int usb_stor_dbg(const struct us_data *us, const char *fmt, ...)
va_start(args, fmt);
r = dev_vprintk_emit(7, &us->pusb_dev->dev, fmt, args);
r = dev_vprintk_emit(LOGLEVEL_DEBUG, &us->pusb_dev->dev, fmt, args);
va_end(args);

40
fs/binfmt_elf.c
View File

@ -1994,18 +1994,6 @@ static void fill_extnum_info(struct elfhdr *elf, struct elf_shdr *shdr4extnum,
shdr4extnum->sh_info = segs;
}
static size_t elf_core_vma_data_size(struct vm_area_struct *gate_vma,
unsigned long mm_flags)
{
struct vm_area_struct *vma;
size_t size = 0;
for (vma = first_vma(current, gate_vma); vma != NULL;
vma = next_vma(vma, gate_vma))
size += vma_dump_size(vma, mm_flags);
return size;
}
/*
* Actual dumper
*
@ -2017,7 +2005,8 @@ static int elf_core_dump(struct coredump_params *cprm)
{
int has_dumped = 0;
mm_segment_t fs;
int segs;
int segs, i;
size_t vma_data_size = 0;
struct vm_area_struct *vma, *gate_vma;
struct elfhdr *elf = NULL;
loff_t offset = 0, dataoff;
@ -2026,6 +2015,7 @@ static int elf_core_dump(struct coredump_params *cprm)
struct elf_shdr *shdr4extnum = NULL;
Elf_Half e_phnum;
elf_addr_t e_shoff;
elf_addr_t *vma_filesz = NULL;
/*
* We no longer stop all VM operations.
@ -2093,7 +2083,20 @@ static int elf_core_dump(struct coredump_params *cprm)
dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
offset += elf_core_vma_data_size(gate_vma, cprm->mm_flags);
vma_filesz = kmalloc_array(segs - 1, sizeof(*vma_filesz), GFP_KERNEL);
if (!vma_filesz)
goto end_coredump;
for (i = 0, vma = first_vma(current, gate_vma); vma != NULL;
vma = next_vma(vma, gate_vma)) {
unsigned long dump_size;
dump_size = vma_dump_size(vma, cprm->mm_flags);
vma_filesz[i++] = dump_size;
vma_data_size += dump_size;
}
offset += vma_data_size;
offset += elf_core_extra_data_size();
e_shoff = offset;
@ -2113,7 +2116,7 @@ static int elf_core_dump(struct coredump_params *cprm)
goto end_coredump;
/* Write program headers for segments dump */
for (vma = first_vma(current, gate_vma); vma != NULL;
for (i = 0, vma = first_vma(current, gate_vma); vma != NULL;
vma = next_vma(vma, gate_vma)) {
struct elf_phdr phdr;
@ -2121,7 +2124,7 @@ static int elf_core_dump(struct coredump_params *cprm)
phdr.p_offset = offset;
phdr.p_vaddr = vma->vm_start;
phdr.p_paddr = 0;
phdr.p_filesz = vma_dump_size(vma, cprm->mm_flags);
phdr.p_filesz = vma_filesz[i++];
phdr.p_memsz = vma->vm_end - vma->vm_start;
offset += phdr.p_filesz;
phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0;
@ -2149,12 +2152,12 @@ static int elf_core_dump(struct coredump_params *cprm)
if (!dump_skip(cprm, dataoff - cprm->written))
goto end_coredump;
for (vma = first_vma(current, gate_vma); vma != NULL;
for (i = 0, vma = first_vma(current, gate_vma); vma != NULL;
vma = next_vma(vma, gate_vma)) {
unsigned long addr;
unsigned long end;
end = vma->vm_start + vma_dump_size(vma, cprm->mm_flags);
end = vma->vm_start + vma_filesz[i++];
for (addr = vma->vm_start; addr < end; addr += PAGE_SIZE) {
struct page *page;
@ -2187,6 +2190,7 @@ end_coredump:
cleanup:
free_note_info(&info);
kfree(shdr4extnum);
kfree(vma_filesz);
kfree(phdr4note);
kfree(elf);
out:

385
fs/binfmt_misc.c
View File

@ -1,21 +1,14 @@
/*
* binfmt_misc.c
* binfmt_misc.c
*
* Copyright (C) 1997 Richard Günther
* Copyright (C) 1997 Richard Günther
*
* binfmt_misc detects binaries via a magic or filename extension and invokes
* a specified wrapper. This should obsolete binfmt_java, binfmt_em86 and
* binfmt_mz.
*
* 1997-04-25 first version
* [...]
* 1997-05-19 cleanup
* 1997-06-26 hpa: pass the real filename rather than argv[0]
* 1997-06-30 minor cleanup
* 1997-08-09 removed extension stripping, locking cleanup
* 2001-02-28 AV: rewritten into something that resembles C. Original didn't.
* binfmt_misc detects binaries via a magic or filename extension and invokes
* a specified wrapper. See Documentation/binfmt_misc.txt for more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
@ -30,8 +23,13 @@
#include <linux/mount.h>
#include <linux/syscalls.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <asm/uaccess.h>
#ifdef DEBUG
# define USE_DEBUG 1
#else
# define USE_DEBUG 0
#endif
enum {
VERBOSE_STATUS = 1 /* make it zero to save 400 bytes kernel memory */
@ -41,9 +39,9 @@ static LIST_HEAD(entries);
static int enabled = 1;
enum {Enabled, Magic};
#define MISC_FMT_PRESERVE_ARGV0 (1<<31)
#define MISC_FMT_OPEN_BINARY (1<<30)
#define MISC_FMT_CREDENTIALS (1<<29)
#define MISC_FMT_PRESERVE_ARGV0 (1 << 31)
#define MISC_FMT_OPEN_BINARY (1 << 30)
#define MISC_FMT_CREDENTIALS (1 << 29)
typedef struct {
struct list_head list;
@ -87,20 +85,24 @@ static Node *check_file(struct linux_binprm *bprm)
char *p = strrchr(bprm->interp, '.');
struct list_head *l;
/* Walk all the registered handlers. */
list_for_each(l, &entries) {
Node *e = list_entry(l, Node, list);
char *s;
int j;
/* Make sure this one is currently enabled. */
if (!test_bit(Enabled, &e->flags))
continue;
/* Do matching based on extension if applicable. */
if (!test_bit(Magic, &e->flags)) {
if (p && !strcmp(e->magic, p + 1))
return e;
continue;
}
/* Do matching based on magic & mask. */
s = bprm->buf + e->offset;
if (e->mask) {
for (j = 0; j < e->size; j++)
@ -123,7 +125,7 @@ static Node *check_file(struct linux_binprm *bprm)
static int load_misc_binary(struct linux_binprm *bprm)
{
Node *fmt;
struct file * interp_file = NULL;
struct file *interp_file = NULL;
char iname[BINPRM_BUF_SIZE];
const char *iname_addr = iname;
int retval;
@ -131,7 +133,7 @@ static int load_misc_binary(struct linux_binprm *bprm)
retval = -ENOEXEC;
if (!enabled)
goto _ret;
goto ret;
/* to keep locking time low, we copy the interpreter string */
read_lock(&entries_lock);
@ -140,25 +142,26 @@ static int load_misc_binary(struct linux_binprm *bprm)
strlcpy(iname, fmt->interpreter, BINPRM_BUF_SIZE);
read_unlock(&entries_lock);
if (!fmt)
goto _ret;
goto ret;
if (!(fmt->flags & MISC_FMT_PRESERVE_ARGV0)) {
retval = remove_arg_zero(bprm);
if (retval)
goto _ret;
goto ret;
}
if (fmt->flags & MISC_FMT_OPEN_BINARY) {
/* if the binary should be opened on behalf of the
* interpreter than keep it open and assign descriptor
* to it */
fd_binary = get_unused_fd();
if (fd_binary < 0) {
retval = fd_binary;
goto _ret;
}
fd_install(fd_binary, bprm->file);
* to it
*/
fd_binary = get_unused_fd_flags(0);
if (fd_binary < 0) {
retval = fd_binary;
goto ret;
}
fd_install(fd_binary, bprm->file);
/* if the binary is not readable than enforce mm->dumpable=0
regardless of the interpreter's permissions */
@ -171,32 +174,32 @@ static int load_misc_binary(struct linux_binprm *bprm)
bprm->interp_flags |= BINPRM_FLAGS_EXECFD;
bprm->interp_data = fd_binary;
} else {
allow_write_access(bprm->file);
fput(bprm->file);
bprm->file = NULL;
}
} else {
allow_write_access(bprm->file);
fput(bprm->file);
bprm->file = NULL;
}
/* make argv[1] be the path to the binary */
retval = copy_strings_kernel (1, &bprm->interp, bprm);
retval = copy_strings_kernel(1, &bprm->interp, bprm);
if (retval < 0)
goto _error;
goto error;
bprm->argc++;
/* add the interp as argv[0] */
retval = copy_strings_kernel (1, &iname_addr, bprm);
retval = copy_strings_kernel(1, &iname_addr, bprm);
if (retval < 0)
goto _error;
bprm->argc ++;
goto error;
bprm->argc++;
/* Update interp in case binfmt_script needs it. */
retval = bprm_change_interp(iname, bprm);
if (retval < 0)
goto _error;
goto error;
interp_file = open_exec (iname);
retval = PTR_ERR (interp_file);
if (IS_ERR (interp_file))
goto _error;
interp_file = open_exec(iname);
retval = PTR_ERR(interp_file);
if (IS_ERR(interp_file))
goto error;
bprm->file = interp_file;
if (fmt->flags & MISC_FMT_CREDENTIALS) {
@ -207,23 +210,23 @@ static int load_misc_binary(struct linux_binprm *bprm)
memset(bprm->buf, 0, BINPRM_BUF_SIZE);
retval = kernel_read(bprm->file, 0, bprm->buf, BINPRM_BUF_SIZE);
} else
retval = prepare_binprm (bprm);
retval = prepare_binprm(bprm);
if (retval < 0)
goto _error;
goto error;
retval = search_binary_handler(bprm);
if (retval < 0)
goto _error;
goto error;
_ret:
ret:
return retval;
_error:
error:
if (fd_binary > 0)
sys_close(fd_binary);
bprm->interp_flags = 0;
bprm->interp_data = 0;
goto _ret;
goto ret;
}
/* Command parsers */
@ -250,36 +253,40 @@ static char *scanarg(char *s, char del)
return s;
}
static char * check_special_flags (char * sfs, Node * e)
static char *check_special_flags(char *sfs, Node *e)
{
char * p = sfs;
char *p = sfs;
int cont = 1;
/* special flags */
while (cont) {
switch (*p) {
case 'P':
p++;
e->flags |= MISC_FMT_PRESERVE_ARGV0;
break;
case 'O':
p++;
e->flags |= MISC_FMT_OPEN_BINARY;
break;
case 'C':
p++;
/* this flags also implies the
open-binary flag */
e->flags |= (MISC_FMT_CREDENTIALS |
MISC_FMT_OPEN_BINARY);
break;
default:
cont = 0;
case 'P':
pr_debug("register: flag: P (preserve argv0)\n");
p++;
e->flags |= MISC_FMT_PRESERVE_ARGV0;
break;
case 'O':
pr_debug("register: flag: O (open binary)\n");
p++;
e->flags |= MISC_FMT_OPEN_BINARY;
break;
case 'C':
pr_debug("register: flag: C (preserve creds)\n");
p++;
/* this flags also implies the
open-binary flag */
e->flags |= (MISC_FMT_CREDENTIALS |
MISC_FMT_OPEN_BINARY);
break;
default:
cont = 0;
}
}
return p;
}
/*
* This registers a new binary format, it recognises the syntax
* ':name:type:offset:magic:mask:interpreter:flags'
@ -292,6 +299,8 @@ static Node *create_entry(const char __user *buffer, size_t count)
char *buf, *p;
char del;
pr_debug("register: received %zu bytes\n", count);
/* some sanity checks */
err = -EINVAL;
if ((count < 11) || (count > MAX_REGISTER_LENGTH))
@ -299,7 +308,7 @@ static Node *create_entry(const char __user *buffer, size_t count)
err = -ENOMEM;
memsize = sizeof(Node) + count + 8;
e = kmalloc(memsize, GFP_USER);
e = kmalloc(memsize, GFP_KERNEL);
if (!e)
goto out;
@ -307,98 +316,175 @@ static Node *create_entry(const char __user *buffer, size_t count)
memset(e, 0, sizeof(Node));
if (copy_from_user(buf, buffer, count))
goto Efault;
goto efault;
del = *p++; /* delimeter */
memset(buf+count, del, 8);
pr_debug("register: delim: %#x {%c}\n", del, del);
/* Pad the buffer with the delim to simplify parsing below. */
memset(buf + count, del, 8);
/* Parse the 'name' field. */
e->name = p;
p = strchr(p, del);
if (!p)
goto Einval;
goto einval;
*p++ = '\0';
if (!e->name[0] ||
!strcmp(e->name, ".") ||
!strcmp(e->name, "..") ||
strchr(e->name, '/'))
goto Einval;
goto einval;
pr_debug("register: name: {%s}\n", e->name);
/* Parse the 'type' field. */
switch (*p++) {
case 'E': e->flags = 1<<Enabled; break;
case 'M': e->flags = (1<<Enabled) | (1<<Magic); break;
default: goto Einval;
case 'E':
pr_debug("register: type: E (extension)\n");
e->flags = 1 << Enabled;
break;
case 'M':
pr_debug("register: type: M (magic)\n");
e->flags = (1 << Enabled) | (1 << Magic);
break;
default:
goto einval;
}
if (*p++ != del)
goto Einval;
goto einval;
if (test_bit(Magic, &e->flags)) {
char *s = strchr(p, del);
/* Handle the 'M' (magic) format. */
char *s;
/* Parse the 'offset' field. */
s = strchr(p, del);
if (!s)
goto Einval;
goto einval;
*s++ = '\0';
e->offset = simple_strtoul(p, &p, 10);
if (*p++)
goto Einval;
goto einval;
pr_debug("register: offset: %#x\n", e->offset);
/* Parse the 'magic' field. */
e->magic = p;
p = scanarg(p, del);
if (!p)
goto Einval;
goto einval;
p[-1] = '\0';
if (!e->magic[0])
goto Einval;
if (p == e->magic)
goto einval;
if (USE_DEBUG)
print_hex_dump_bytes(
KBUILD_MODNAME ": register: magic[raw]: ",
DUMP_PREFIX_NONE, e->magic, p - e->magic);
/* Parse the 'mask' field. */
e->mask = p;
p = scanarg(p, del);
if (!p)
goto Einval;
goto einval;
p[-1] = '\0';
if (!e->mask[0])
if (p == e->mask) {
e->mask = NULL;
pr_debug("register: mask[raw]: none\n");
} else if (USE_DEBUG)
print_hex_dump_bytes(
KBUILD_MODNAME ": register: mask[raw]: ",
DUMP_PREFIX_NONE, e->mask, p - e->mask);
/*
* Decode the magic & mask fields.
* Note: while we might have accepted embedded NUL bytes from
* above, the unescape helpers here will stop at the first one
* it encounters.
*/
e->size = string_unescape_inplace(e->magic, UNESCAPE_HEX);
if (e->mask &&
string_unescape_inplace(e->mask, UNESCAPE_HEX) != e->size)
goto Einval;
goto einval;
if (e->size + e->offset > BINPRM_BUF_SIZE)
goto Einval;
goto einval;
pr_debug("register: magic/mask length: %i\n", e->size);
if (USE_DEBUG) {
print_hex_dump_bytes(
KBUILD_MODNAME ": register: magic[decoded]: ",
DUMP_PREFIX_NONE, e->magic, e->size);
if (e->mask) {
int i;
char *masked = kmalloc(e->size, GFP_KERNEL);
print_hex_dump_bytes(
KBUILD_MODNAME ": register: mask[decoded]: ",
DUMP_PREFIX_NONE, e->mask, e->size);
if (masked) {
for (i = 0; i < e->size; ++i)
masked[i] = e->magic[i] & e->mask[i];
print_hex_dump_bytes(
KBUILD_MODNAME ": register: magic[masked]: ",
DUMP_PREFIX_NONE, masked, e->size);
kfree(masked);
}
}
}
} else {
/* Handle the 'E' (extension) format. */
/* Skip the 'offset' field. */
p = strchr(p, del);
if (!p)
goto Einval;
goto einval;
*p++ = '\0';
/* Parse the 'magic' field. */
e->magic = p;
p = strchr(p, del);
if (!p)
goto Einval;
goto einval;
*p++ = '\0';
if (!e->magic[0] || strchr(e->magic, '/'))
goto Einval;
goto einval;
pr_debug("register: extension: {%s}\n", e->magic);
/* Skip the 'mask' field. */
p = strchr(p, del);
if (!p)
goto Einval;
goto einval;
*p++ = '\0';
}
/* Parse the 'interpreter' field. */
e->interpreter = p;
p = strchr(p, del);
if (!p)
goto Einval;
goto einval;
*p++ = '\0';
if (!e->interpreter[0])
goto Einval;
p = check_special_flags (p, e);
goto einval;
pr_debug("register: interpreter: {%s}\n", e->interpreter);
/* Parse the 'flags' field. */
p = check_special_flags(p, e);
if (*p == '\n')
p++;
if (p != buf + count)
goto Einval;
goto einval;
return e;
out:
return ERR_PTR(err);
Efault:
efault:
kfree(e);
return ERR_PTR(-EFAULT);
Einval:
einval:
kfree(e);
return ERR_PTR(-EINVAL);
}
@ -417,7 +503,7 @@ static int parse_command(const char __user *buffer, size_t count)
return -EFAULT;
if (!count)
return 0;
if (s[count-1] == '\n')
if (s[count - 1] == '\n')
count--;
if (count == 1 && s[0] == '0')
return 1;
@ -434,7 +520,7 @@ static void entry_status(Node *e, char *page)
{
char *dp;
char *status = "disabled";
const char * flags = "flags: ";
const char *flags = "flags: ";
if (test_bit(Enabled, &e->flags))
status = "enabled";
@ -448,19 +534,15 @@ static void entry_status(Node *e, char *page)
dp = page + strlen(page);
/* print the special flags */
sprintf (dp, "%s", flags);
dp += strlen (flags);
if (e->flags & MISC_FMT_PRESERVE_ARGV0) {
*dp ++ = 'P';
}
if (e->flags & MISC_FMT_OPEN_BINARY) {
*dp ++ = 'O';
}
if (e->flags & MISC_FMT_CREDENTIALS) {
*dp ++ = 'C';
}
*dp ++ = '\n';
sprintf(dp, "%s", flags);
dp += strlen(flags);
if (e->flags & MISC_FMT_PRESERVE_ARGV0)
*dp++ = 'P';
if (e->flags & MISC_FMT_OPEN_BINARY)
*dp++ = 'O';
if (e->flags & MISC_FMT_CREDENTIALS)
*dp++ = 'C';
*dp++ = '\n';
if (!test_bit(Magic, &e->flags)) {
sprintf(dp, "extension .%s\n", e->magic);
@ -488,7 +570,7 @@ static void entry_status(Node *e, char *page)
static struct inode *bm_get_inode(struct super_block *sb, int mode)
{
struct inode * inode = new_inode(sb);
struct inode *inode = new_inode(sb);
if (inode) {
inode->i_ino = get_next_ino();
@ -528,13 +610,14 @@ static void kill_node(Node *e)
/* /<entry> */
static ssize_t
bm_entry_read(struct file * file, char __user * buf, size_t nbytes, loff_t *ppos)
bm_entry_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
{
Node *e = file_inode(file)->i_private;
ssize_t res;
char *page;
if (!(page = (char*) __get_free_page(GFP_KERNEL)))
page = (char *) __get_free_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
entry_status(e, page);
@ -553,20 +636,28 @@ static ssize_t bm_entry_write(struct file *file, const char __user *buffer,
int res = parse_command(buffer, count);
switch (res) {
case 1: clear_bit(Enabled, &e->flags);
break;
case 2: set_bit(Enabled, &e->flags);
break;
case 3: root = dget(file->f_path.dentry->d_sb->s_root);
mutex_lock(&root->d_inode->i_mutex);
case 1:
/* Disable this handler. */
clear_bit(Enabled, &e->flags);
break;
case 2:
/* Enable this handler. */
set_bit(Enabled, &e->flags);
break;
case 3:
/* Delete this handler. */
root = dget(file->f_path.dentry->d_sb->s_root);
mutex_lock(&root->d_inode->i_mutex);
kill_node(e);
kill_node(e);
mutex_unlock(&root->d_inode->i_mutex);
dput(root);
break;
default: return res;
mutex_unlock(&root->d_inode->i_mutex);
dput(root);
break;
default:
return res;
}
return count;
}
@ -654,26 +745,36 @@ bm_status_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
return simple_read_from_buffer(buf, nbytes, ppos, s, strlen(s));
}
static ssize_t bm_status_write(struct file * file, const char __user * buffer,
static ssize_t bm_status_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
int res = parse_command(buffer, count);
struct dentry *root;
switch (res) {
case 1: enabled = 0; break;
case 2: enabled = 1; break;
case 3: root = dget(file->f_path.dentry->d_sb->s_root);
mutex_lock(&root->d_inode->i_mutex);
case 1:
/* Disable all handlers. */
enabled = 0;
break;
case 2:
/* Enable all handlers. */
enabled = 1;
break;
case 3:
/* Delete all handlers. */
root = dget(file->f_path.dentry->d_sb->s_root);
mutex_lock(&root->d_inode->i_mutex);
while (!list_empty(&entries))
kill_node(list_entry(entries.next, Node, list));
while (!list_empty(&entries))
kill_node(list_entry(entries.next, Node, list));
mutex_unlock(&root->d_inode->i_mutex);
dput(root);
break;
default: return res;
mutex_unlock(&root->d_inode->i_mutex);
dput(root);
break;
default:
return res;
}
return count;
}
@ -690,14 +791,16 @@ static const struct super_operations s_ops = {
.evict_inode = bm_evict_inode,
};
static int bm_fill_super(struct super_block * sb, void * data, int silent)
static int bm_fill_super(struct super_block *sb, void *data, int silent)
{
int err;
static struct tree_descr bm_files[] = {
[2] = {"status", &bm_status_operations, S_IWUSR|S_IRUGO},
[3] = {"register", &bm_register_operations, S_IWUSR},
/* last one */ {""}
};
int err = simple_fill_super(sb, BINFMTFS_MAGIC, bm_files);
err = simple_fill_super(sb, BINFMTFS_MAGIC, bm_files);
if (!err)
sb->s_op = &s_ops;
return err;

1
fs/char_dev.c
View File

@ -117,7 +117,6 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
goto out;
}
major = i;
ret = major;
}
cd->major = major;

2
fs/cifs/cifsacl.c
View File

@ -38,7 +38,7 @@ static const struct cifs_sid sid_everyone = {
1, 1, {0, 0, 0, 0, 0, 1}, {0} };
/* security id for Authenticated Users system group */
static const struct cifs_sid sid_authusers = {
1, 1, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(11)} };
1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(11)} };
/* group users */
static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} };

20
fs/cifs/cifssmb.c
View File

@ -2477,14 +2477,14 @@ CIFSSMBPosixLock(const unsigned int xid, struct cifs_tcon *tcon,
}
parm_data = (struct cifs_posix_lock *)
((char *)&pSMBr->hdr.Protocol + data_offset);
if (parm_data->lock_type == __constant_cpu_to_le16(CIFS_UNLCK))
if (parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
pLockData->fl_type = F_UNLCK;
else {
if (parm_data->lock_type ==
__constant_cpu_to_le16(CIFS_RDLCK))
cpu_to_le16(CIFS_RDLCK))
pLockData->fl_type = F_RDLCK;
else if (parm_data->lock_type ==
__constant_cpu_to_le16(CIFS_WRLCK))
cpu_to_le16(CIFS_WRLCK))
pLockData->fl_type = F_WRLCK;
pLockData->fl_start = le64_to_cpu(parm_data->start);
@ -3276,25 +3276,25 @@ CIFSSMB_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
pSMB->compression_state = cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
pSMB->TotalParameterCount = 0;
pSMB->TotalDataCount = __constant_cpu_to_le32(2);
pSMB->TotalDataCount = cpu_to_le32(2);
pSMB->MaxParameterCount = 0;
pSMB->MaxDataCount = 0;
pSMB->MaxSetupCount = 4;
pSMB->Reserved = 0;
pSMB->ParameterOffset = 0;
pSMB->DataCount = __constant_cpu_to_le32(2);
pSMB->DataCount = cpu_to_le32(2);
pSMB->DataOffset =
cpu_to_le32(offsetof(struct smb_com_transaction_compr_ioctl_req,
compression_state) - 4); /* 84 */
pSMB->SetupCount = 4;
pSMB->SubCommand = __constant_cpu_to_le16(NT_TRANSACT_IOCTL);
pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL);
pSMB->ParameterCount = 0;
pSMB->FunctionCode = __constant_cpu_to_le32(FSCTL_SET_COMPRESSION);
pSMB->FunctionCode = cpu_to_le32(FSCTL_SET_COMPRESSION);
pSMB->IsFsctl = 1; /* FSCTL */
pSMB->IsRootFlag = 0;
pSMB->Fid = fid; /* file handle always le */
/* 3 byte pad, followed by 2 byte compress state */
pSMB->ByteCount = __constant_cpu_to_le16(5);
pSMB->ByteCount = cpu_to_le16(5);
inc_rfc1001_len(pSMB, 5);
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
@ -3430,10 +3430,10 @@ static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL,
cifs_acl->version = cpu_to_le16(1);
if (acl_type == ACL_TYPE_ACCESS) {
cifs_acl->access_entry_count = cpu_to_le16(count);
cifs_acl->default_entry_count = __constant_cpu_to_le16(0xFFFF);
cifs_acl->default_entry_count = cpu_to_le16(0xFFFF);
} else if (acl_type == ACL_TYPE_DEFAULT) {
cifs_acl->default_entry_count = cpu_to_le16(count);
cifs_acl->access_entry_count = __constant_cpu_to_le16(0xFFFF);
cifs_acl->access_entry_count = cpu_to_le16(0xFFFF);
} else {
cifs_dbg(FYI, "unknown ACL type %d\n", acl_type);
return 0;

4
fs/cifs/file.c
View File

@ -1066,7 +1066,7 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
max_num = (max_buf - sizeof(struct smb_hdr)) /
sizeof(LOCKING_ANDX_RANGE);
buf = kzalloc(max_num * sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL);
buf = kcalloc(max_num, sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL);
if (!buf) {
free_xid(xid);
return -ENOMEM;
@ -1401,7 +1401,7 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock,
max_num = (max_buf - sizeof(struct smb_hdr)) /
sizeof(LOCKING_ANDX_RANGE);
buf = kzalloc(max_num * sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL);
buf = kcalloc(max_num, sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL);
if (!buf)
return -ENOMEM;

2
fs/cifs/sess.c
View File

@ -46,7 +46,7 @@ static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB)
CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4,
USHRT_MAX));
pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
pSMB->req.VcNumber = __constant_cpu_to_le16(1);
pSMB->req.VcNumber = cpu_to_le16(1);
/* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */

4
fs/cifs/smb2file.c
View File

@ -111,7 +111,7 @@ smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock,
return -EINVAL;
max_num = max_buf / sizeof(struct smb2_lock_element);
buf = kzalloc(max_num * sizeof(struct smb2_lock_element), GFP_KERNEL);
buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
if (!buf)
return -ENOMEM;
@ -247,7 +247,7 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
}
max_num = max_buf / sizeof(struct smb2_lock_element);
buf = kzalloc(max_num * sizeof(struct smb2_lock_element), GFP_KERNEL);
buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
if (!buf) {
free_xid(xid);
return -ENOMEM;

38
fs/cifs/smb2misc.c
View File

@ -67,27 +67,27 @@ check_smb2_hdr(struct smb2_hdr *hdr, __u64 mid)
* indexed by command in host byte order
*/
static const __le16 smb2_rsp_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
/* SMB2_NEGOTIATE */ __constant_cpu_to_le16(65),
/* SMB2_SESSION_SETUP */ __constant_cpu_to_le16(9),
/* SMB2_LOGOFF */ __constant_cpu_to_le16(4),
/* SMB2_TREE_CONNECT */ __constant_cpu_to_le16(16),
/* SMB2_TREE_DISCONNECT */ __constant_cpu_to_le16(4),
/* SMB2_CREATE */ __constant_cpu_to_le16(89),
/* SMB2_CLOSE */ __constant_cpu_to_le16(60),
/* SMB2_FLUSH */ __constant_cpu_to_le16(4),
/* SMB2_READ */ __constant_cpu_to_le16(17),
/* SMB2_WRITE */ __constant_cpu_to_le16(17),
/* SMB2_LOCK */ __constant_cpu_to_le16(4),
/* SMB2_IOCTL */ __constant_cpu_to_le16(49),
/* SMB2_NEGOTIATE */ cpu_to_le16(65),
/* SMB2_SESSION_SETUP */ cpu_to_le16(9),
/* SMB2_LOGOFF */ cpu_to_le16(4),
/* SMB2_TREE_CONNECT */ cpu_to_le16(16),
/* SMB2_TREE_DISCONNECT */ cpu_to_le16(4),
/* SMB2_CREATE */ cpu_to_le16(89),
/* SMB2_CLOSE */ cpu_to_le16(60),
/* SMB2_FLUSH */ cpu_to_le16(4),
/* SMB2_READ */ cpu_to_le16(17),
/* SMB2_WRITE */ cpu_to_le16(17),
/* SMB2_LOCK */ cpu_to_le16(4),
/* SMB2_IOCTL */ cpu_to_le16(49),
/* BB CHECK this ... not listed in documentation */
/* SMB2_CANCEL */ __constant_cpu_to_le16(0),
/* SMB2_ECHO */ __constant_cpu_to_le16(4),
/* SMB2_QUERY_DIRECTORY */ __constant_cpu_to_le16(9),
/* SMB2_CHANGE_NOTIFY */ __constant_cpu_to_le16(9),
/* SMB2_QUERY_INFO */ __constant_cpu_to_le16(9),
/* SMB2_SET_INFO */ __constant_cpu_to_le16(2),
/* SMB2_CANCEL */ cpu_to_le16(0),
/* SMB2_ECHO */ cpu_to_le16(4),
/* SMB2_QUERY_DIRECTORY */ cpu_to_le16(9),
/* SMB2_CHANGE_NOTIFY */ cpu_to_le16(9),
/* SMB2_QUERY_INFO */ cpu_to_le16(9),
/* SMB2_SET_INFO */ cpu_to_le16(2),
/* BB FIXME can also be 44 for lease break */
/* SMB2_OPLOCK_BREAK */ __constant_cpu_to_le16(24)
/* SMB2_OPLOCK_BREAK */ cpu_to_le16(24)
};
int

2
fs/cifs/smb2ops.c
View File

@ -600,7 +600,7 @@ smb2_clone_range(const unsigned int xid,
goto cchunk_out;
/* For now array only one chunk long, will make more flexible later */
pcchunk->ChunkCount = __constant_cpu_to_le32(1);
pcchunk->ChunkCount = cpu_to_le32(1);
pcchunk->Reserved = 0;
pcchunk->Reserved2 = 0;

2
fs/cifs/smb2pdu.c
View File

@ -1358,7 +1358,7 @@ SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
char *ret_data = NULL;
fsctl_input.CompressionState =
__constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
FSCTL_SET_COMPRESSION, true /* is_fsctl */,

28
fs/cifs/smb2pdu.h
View File

@ -85,7 +85,7 @@
/* BB FIXME - analyze following length BB */
#define MAX_SMB2_HDR_SIZE 0x78 /* 4 len + 64 hdr + (2*24 wct) + 2 bct + 2 pad */
#define SMB2_PROTO_NUMBER __constant_cpu_to_le32(0x424d53fe)
#define SMB2_PROTO_NUMBER cpu_to_le32(0x424d53fe)
/*
* SMB2 Header Definition
@ -96,7 +96,7 @@
*
*/
#define SMB2_HEADER_STRUCTURE_SIZE __constant_cpu_to_le16(64)
#define SMB2_HEADER_STRUCTURE_SIZE cpu_to_le16(64)
struct smb2_hdr {
__be32 smb2_buf_length; /* big endian on wire */
@ -137,16 +137,16 @@ struct smb2_transform_hdr {
} __packed;
/* Encryption Algorithms */
#define SMB2_ENCRYPTION_AES128_CCM __constant_cpu_to_le16(0x0001)
#define SMB2_ENCRYPTION_AES128_CCM cpu_to_le16(0x0001)
/*
* SMB2 flag definitions
*/
#define SMB2_FLAGS_SERVER_TO_REDIR __constant_cpu_to_le32(0x00000001)
#define SMB2_FLAGS_ASYNC_COMMAND __constant_cpu_to_le32(0x00000002)
#define SMB2_FLAGS_RELATED_OPERATIONS __constant_cpu_to_le32(0x00000004)
#define SMB2_FLAGS_SIGNED __constant_cpu_to_le32(0x00000008)
#define SMB2_FLAGS_DFS_OPERATIONS __constant_cpu_to_le32(0x10000000)
#define SMB2_FLAGS_SERVER_TO_REDIR cpu_to_le32(0x00000001)
#define SMB2_FLAGS_ASYNC_COMMAND cpu_to_le32(0x00000002)
#define SMB2_FLAGS_RELATED_OPERATIONS cpu_to_le32(0x00000004)
#define SMB2_FLAGS_SIGNED cpu_to_le32(0x00000008)
#define SMB2_FLAGS_DFS_OPERATIONS cpu_to_le32(0x10000000)
/*
* Definitions for SMB2 Protocol Data Units (network frames)
@ -157,7 +157,7 @@ struct smb2_transform_hdr {
*
*/
#define SMB2_ERROR_STRUCTURE_SIZE2 __constant_cpu_to_le16(9)
#define SMB2_ERROR_STRUCTURE_SIZE2 cpu_to_le16(9)
struct smb2_err_rsp {
struct smb2_hdr hdr;
@ -502,12 +502,12 @@ struct create_context {
#define SMB2_LEASE_HANDLE_CACHING_HE 0x02
#define SMB2_LEASE_WRITE_CACHING_HE 0x04
#define SMB2_LEASE_NONE __constant_cpu_to_le32(0x00)
#define SMB2_LEASE_READ_CACHING __constant_cpu_to_le32(0x01)
#define SMB2_LEASE_HANDLE_CACHING __constant_cpu_to_le32(0x02)
#define SMB2_LEASE_WRITE_CACHING __constant_cpu_to_le32(0x04)
#define SMB2_LEASE_NONE cpu_to_le32(0x00)
#define SMB2_LEASE_READ_CACHING cpu_to_le32(0x01)
#define SMB2_LEASE_HANDLE_CACHING cpu_to_le32(0x02)
#define SMB2_LEASE_WRITE_CACHING cpu_to_le32(0x04)
#define SMB2_LEASE_FLAG_BREAK_IN_PROGRESS __constant_cpu_to_le32(0x02)
#define SMB2_LEASE_FLAG_BREAK_IN_PROGRESS cpu_to_le32(0x02)
#define SMB2_LEASE_KEY_SIZE 16

2
fs/file.c
View File

@ -869,7 +869,7 @@ SYSCALL_DEFINE1(dup, unsigned int, fildes)
struct file *file = fget_raw(fildes);
if (file) {
ret = get_unused_fd();
ret = get_unused_fd_flags(0);
if (ret >= 0)
fd_install(ret, file);
else

14
fs/hfs/catalog.c
View File

@ -162,14 +162,16 @@ err2:
*/
int hfs_cat_keycmp(const btree_key *key1, const btree_key *key2)
{
int retval;
__be32 k1p, k2p;
retval = be32_to_cpu(key1->cat.ParID) - be32_to_cpu(key2->cat.ParID);
if (!retval)
retval = hfs_strcmp(key1->cat.CName.name, key1->cat.CName.len,
key2->cat.CName.name, key2->cat.CName.len);
k1p = key1->cat.ParID;
k2p = key2->cat.ParID;
return retval;
if (k1p != k2p)
return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1;
return hfs_strcmp(key1->cat.CName.name, key1->cat.CName.len,
key2->cat.CName.name, key2->cat.CName.len);
}
/* Try to get a catalog entry for given catalog id */

1
fs/ncpfs/ioctl.c
View File

@ -447,7 +447,6 @@ static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg
result = -EIO;
}
}
result = 0;
}
mutex_unlock(&server->root_setup_lock);

10
fs/nilfs2/file.c
View File

@ -39,21 +39,15 @@ int nilfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
*/
struct the_nilfs *nilfs;
struct inode *inode = file->f_mapping->host;
int err;
err = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (err)
return err;
mutex_lock(&inode->i_mutex);
int err = 0;
if (nilfs_inode_dirty(inode)) {
if (datasync)
err = nilfs_construct_dsync_segment(inode->i_sb, inode,
0, LLONG_MAX);
start, end);
else
err = nilfs_construct_segment(inode->i_sb);
}
mutex_unlock(&inode->i_mutex);
nilfs = inode->i_sb->s_fs_info;
if (!err)

32
fs/nilfs2/inode.c
View File

@ -49,6 +49,8 @@ struct nilfs_iget_args {
int for_gc;
};
static int nilfs_iget_test(struct inode *inode, void *opaque);
void nilfs_inode_add_blocks(struct inode *inode, int n)
{
struct nilfs_root *root = NILFS_I(inode)->i_root;
@ -348,6 +350,17 @@ const struct address_space_operations nilfs_aops = {
.is_partially_uptodate = block_is_partially_uptodate,
};
static int nilfs_insert_inode_locked(struct inode *inode,
struct nilfs_root *root,
unsigned long ino)
{
struct nilfs_iget_args args = {
.ino = ino, .root = root, .cno = 0, .for_gc = 0
};
return insert_inode_locked4(inode, ino, nilfs_iget_test, &args);
}
struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
{
struct super_block *sb = dir->i_sb;
@ -383,7 +396,7 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
err = nilfs_bmap_read(ii->i_bmap, NULL);
if (err < 0)
goto failed_bmap;
goto failed_after_creation;
set_bit(NILFS_I_BMAP, &ii->i_state);
/* No lock is needed; iget() ensures it. */
@ -399,21 +412,24 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
spin_lock(&nilfs->ns_next_gen_lock);
inode->i_generation = nilfs->ns_next_generation++;
spin_unlock(&nilfs->ns_next_gen_lock);
insert_inode_hash(inode);
if (nilfs_insert_inode_locked(inode, root, ino) < 0) {
err = -EIO;
goto failed_after_creation;
}
err = nilfs_init_acl(inode, dir);
if (unlikely(err))
goto failed_acl; /* never occur. When supporting
goto failed_after_creation; /* never occur. When supporting
nilfs_init_acl(), proper cancellation of
above jobs should be considered */
return inode;
failed_acl:
failed_bmap:
failed_after_creation:
clear_nlink(inode);
unlock_new_inode(inode);
iput(inode); /* raw_inode will be deleted through
generic_delete_inode() */
nilfs_evict_inode() */
goto failed;
failed_ifile_create_inode:
@ -461,8 +477,8 @@ int nilfs_read_inode_common(struct inode *inode,
inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec);
inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
if (inode->i_nlink == 0 && inode->i_mode == 0)
return -EINVAL; /* this inode is deleted */
if (inode->i_nlink == 0)
return -ESTALE; /* this inode is deleted */
inode->i_blocks = le64_to_cpu(raw_inode->i_blocks);
ii->i_flags = le32_to_cpu(raw_inode->i_flags);

15
fs/nilfs2/namei.c
View File

@ -51,9 +51,11 @@ static inline int nilfs_add_nondir(struct dentry *dentry, struct inode *inode)
int err = nilfs_add_link(dentry, inode);
if (!err) {
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
}
inode_dec_link_count(inode);
unlock_new_inode(inode);
iput(inode);
return err;
}
@ -182,6 +184,7 @@ out:
out_fail:
drop_nlink(inode);
nilfs_mark_inode_dirty(inode);
unlock_new_inode(inode);
iput(inode);
goto out;
}
@ -201,11 +204,15 @@ static int nilfs_link(struct dentry *old_dentry, struct inode *dir,
inode_inc_link_count(inode);
ihold(inode);
err = nilfs_add_nondir(dentry, inode);
if (!err)
err = nilfs_add_link(dentry, inode);
if (!err) {
d_instantiate(dentry, inode);
err = nilfs_transaction_commit(dir->i_sb);
else
} else {
inode_dec_link_count(inode);
iput(inode);
nilfs_transaction_abort(dir->i_sb);
}
return err;
}
@ -243,6 +250,7 @@ static int nilfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
nilfs_mark_inode_dirty(inode);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
out:
if (!err)
err = nilfs_transaction_commit(dir->i_sb);
@ -255,6 +263,7 @@ out_fail:
drop_nlink(inode);
drop_nlink(inode);
nilfs_mark_inode_dirty(inode);
unlock_new_inode(inode);
iput(inode);
out_dir:
drop_nlink(dir);

3
fs/nilfs2/the_nilfs.c
View File

@ -808,8 +808,7 @@ void nilfs_put_root(struct nilfs_root *root)
spin_lock(&nilfs->ns_cptree_lock);
rb_erase(&root->rb_node, &nilfs->ns_cptree);
spin_unlock(&nilfs->ns_cptree_lock);
if (root->ifile)
iput(root->ifile);
iput(root->ifile);
kfree(root);
}

2
fs/ocfs2/aops.c
View File

@ -1251,7 +1251,7 @@ static int ocfs2_write_cluster(struct address_space *mapping,
ret = ocfs2_extent_map_get_blocks(inode, v_blkno, &p_blkno, NULL,
NULL);
if (ret < 0) {
ocfs2_error(inode->i_sb, "Corrupting extend for inode %llu, "
mlog(ML_ERROR, "Get physical blkno failed for inode %llu, "
"at logical block %llu",
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)v_blkno);

4
fs/ocfs2/cluster/heartbeat.c
View File

@ -1127,10 +1127,10 @@ static int o2hb_thread(void *data)
elapsed_msec = o2hb_elapsed_msecs(&before_hb, &after_hb);
mlog(ML_HEARTBEAT,
"start = %lu.%lu, end = %lu.%lu, msec = %u\n",
"start = %lu.%lu, end = %lu.%lu, msec = %u, ret = %d\n",
before_hb.tv_sec, (unsigned long) before_hb.tv_usec,
after_hb.tv_sec, (unsigned long) after_hb.tv_usec,
elapsed_msec);
elapsed_msec, ret);
if (!kthread_should_stop() &&
elapsed_msec < reg->hr_timeout_ms) {

2
fs/ocfs2/cluster/tcp.c
View File

@ -1736,7 +1736,7 @@ static void o2net_connect_expired(struct work_struct *work)
o2net_idle_timeout() / 1000,
o2net_idle_timeout() % 1000);
o2net_set_nn_state(nn, NULL, 0, -ENOTCONN);
o2net_set_nn_state(nn, NULL, 0, 0);
}
spin_unlock(&nn->nn_lock);
}

2
fs/ocfs2/dir.c
View File

@ -744,7 +744,7 @@ restart:
if (ocfs2_read_dir_block(dir, block, &bh, 0)) {
/* read error, skip block & hope for the best.
* ocfs2_read_dir_block() has released the bh. */
ocfs2_error(dir->i_sb, "reading directory %llu, "
mlog(ML_ERROR, "reading directory %llu, "
"offset %lu\n",
(unsigned long long)OCFS2_I(dir)->ip_blkno,
block);

2
fs/ocfs2/dlm/dlmdomain.c
View File

@ -877,7 +877,7 @@ static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data,
* to be put in someone's domain map.
* Also, explicitly disallow joining at certain troublesome
* times (ie. during recovery). */
if (dlm && dlm->dlm_state != DLM_CTXT_LEAVING) {
if (dlm->dlm_state != DLM_CTXT_LEAVING) {
int bit = query->node_idx;
spin_lock(&dlm->spinlock);

12
fs/ocfs2/dlm/dlmmaster.c
View File

@ -1460,6 +1460,18 @@ way_up_top:
/* take care of the easy cases up front */
spin_lock(&res->spinlock);
/*
* Right after dlm spinlock was released, dlm_thread could have
* purged the lockres. Check if lockres got unhashed. If so
* start over.
*/
if (hlist_unhashed(&res->hash_node)) {
spin_unlock(&res->spinlock);
dlm_lockres_put(res);
goto way_up_top;
}
if (res->state & (DLM_LOCK_RES_RECOVERING|
DLM_LOCK_RES_MIGRATING)) {
spin_unlock(&res->spinlock);

18
fs/ocfs2/dlm/dlmrecovery.c
View File

@ -1656,14 +1656,18 @@ int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
req.namelen = res->lockname.len;
memcpy(req.name, res->lockname.name, res->lockname.len);
resend:
ret = o2net_send_message(DLM_MASTER_REQUERY_MSG, dlm->key,
&req, sizeof(req), nodenum, &status);
/* XXX: negative status not handled properly here. */
if (ret < 0)
mlog(ML_ERROR, "Error %d when sending message %u (key "
"0x%x) to node %u\n", ret, DLM_MASTER_REQUERY_MSG,
dlm->key, nodenum);
else {
else if (status == -ENOMEM) {
mlog_errno(status);
msleep(50);
goto resend;
} else {
BUG_ON(status < 0);
BUG_ON(status > DLM_LOCK_RES_OWNER_UNKNOWN);
*real_master = (u8) (status & 0xff);
@ -1705,9 +1709,13 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
int ret = dlm_dispatch_assert_master(dlm, res,
0, 0, flags);
if (ret < 0) {
mlog_errno(-ENOMEM);
/* retry!? */
BUG();
mlog_errno(ret);
spin_unlock(&res->spinlock);
dlm_lockres_put(res);
spin_unlock(&dlm->spinlock);
dlm_put(dlm);
/* sender will take care of this and retry */
return ret;
} else
__dlm_lockres_grab_inflight_worker(dlm, res);
spin_unlock(&res->spinlock);

37
fs/ocfs2/dlmglue.c
View File

@ -861,8 +861,13 @@ static inline void ocfs2_generic_handle_convert_action(struct ocfs2_lock_res *lo
* We set the OCFS2_LOCK_UPCONVERT_FINISHING flag before clearing
* the OCFS2_LOCK_BUSY flag to prevent the dc thread from
* downconverting the lock before the upconvert has fully completed.
* Do not prevent the dc thread from downconverting if NONBLOCK lock
* had already returned.
*/
lockres_or_flags(lockres, OCFS2_LOCK_UPCONVERT_FINISHING);
if (!(lockres->l_flags & OCFS2_LOCK_NONBLOCK_FINISHED))
lockres_or_flags(lockres, OCFS2_LOCK_UPCONVERT_FINISHING);
else
lockres_clear_flags(lockres, OCFS2_LOCK_NONBLOCK_FINISHED);
lockres_clear_flags(lockres, OCFS2_LOCK_BUSY);
}
@ -1324,13 +1329,12 @@ static void lockres_add_mask_waiter(struct ocfs2_lock_res *lockres,
/* returns 0 if the mw that was removed was already satisfied, -EBUSY
* if the mask still hadn't reached its goal */
static int lockres_remove_mask_waiter(struct ocfs2_lock_res *lockres,
static int __lockres_remove_mask_waiter(struct ocfs2_lock_res *lockres,
struct ocfs2_mask_waiter *mw)
{
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&lockres->l_lock, flags);
assert_spin_locked(&lockres->l_lock);
if (!list_empty(&mw->mw_item)) {
if ((lockres->l_flags & mw->mw_mask) != mw->mw_goal)
ret = -EBUSY;
@ -1338,6 +1342,18 @@ static int lockres_remove_mask_waiter(struct ocfs2_lock_res *lockres,
list_del_init(&mw->mw_item);
init_completion(&mw->mw_complete);
}
return ret;
}
static int lockres_remove_mask_waiter(struct ocfs2_lock_res *lockres,
struct ocfs2_mask_waiter *mw)
{
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&lockres->l_lock, flags);
ret = __lockres_remove_mask_waiter(lockres, mw);
spin_unlock_irqrestore(&lockres->l_lock, flags);
return ret;
@ -1373,6 +1389,7 @@ static int __ocfs2_cluster_lock(struct ocfs2_super *osb,
unsigned long flags;
unsigned int gen;
int noqueue_attempted = 0;
int dlm_locked = 0;
ocfs2_init_mask_waiter(&mw);
@ -1481,6 +1498,7 @@ again:
ocfs2_recover_from_dlm_error(lockres, 1);
goto out;
}
dlm_locked = 1;
mlog(0, "lock %s, successful return from ocfs2_dlm_lock\n",
lockres->l_name);
@ -1514,10 +1532,17 @@ out:
if (wait && arg_flags & OCFS2_LOCK_NONBLOCK &&
mw.mw_mask & (OCFS2_LOCK_BUSY|OCFS2_LOCK_BLOCKED)) {
wait = 0;
if (lockres_remove_mask_waiter(lockres, &mw))
spin_lock_irqsave(&lockres->l_lock, flags);
if (__lockres_remove_mask_waiter(lockres, &mw)) {
if (dlm_locked)
lockres_or_flags(lockres,
OCFS2_LOCK_NONBLOCK_FINISHED);
spin_unlock_irqrestore(&lockres->l_lock, flags);
ret = -EAGAIN;
else
} else {
spin_unlock_irqrestore(&lockres->l_lock, flags);
goto again;
}
}
if (wait) {
ret = ocfs2_wait_for_mask(&mw);

4
fs/ocfs2/file.c
View File

@ -2381,9 +2381,7 @@ out_dio:
if (ret < 0)
written = ret;
if (!ret && ((old_size != i_size_read(inode)) ||
(old_clusters != OCFS2_I(inode)->ip_clusters) ||
has_refcount)) {
if (!ret) {
ret = jbd2_journal_force_commit(osb->journal->j_journal);
if (ret < 0)
written = ret;

3
fs/ocfs2/inode.c
View File

@ -540,8 +540,7 @@ bail:
if (status < 0)
make_bad_inode(inode);
if (args && bh)
brelse(bh);
brelse(bh);
return status;
}

3
fs/ocfs2/move_extents.c
View File

@ -904,9 +904,6 @@ static int ocfs2_move_extents(struct ocfs2_move_extents_context *context)
struct buffer_head *di_bh = NULL;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
if (!inode)
return -ENOENT;
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
return -EROFS;

6
fs/ocfs2/ocfs2.h
View File

@ -144,6 +144,12 @@ enum ocfs2_unlock_action {
* before the upconvert
* has completed */
#define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster
* lock has already
* returned, do not block
* dc thread from
* downconverting */
struct ocfs2_lock_res_ops;
typedef void (*ocfs2_lock_callback)(int status, unsigned long data);

2
fs/ocfs2/slot_map.c
View File

@ -306,7 +306,7 @@ int ocfs2_slot_to_node_num_locked(struct ocfs2_super *osb, int slot_num,
assert_spin_locked(&osb->osb_lock);
BUG_ON(slot_num < 0);
BUG_ON(slot_num > osb->max_slots);
BUG_ON(slot_num >= osb->max_slots);
if (!si->si_slots[slot_num].sl_valid)
return -ENOENT;

3
fs/ocfs2/super.c
View File

@ -1629,8 +1629,9 @@ static int __init ocfs2_init(void)
ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
if (!ocfs2_debugfs_root) {
status = -EFAULT;
status = -ENOMEM;
mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
goto out4;
}
ocfs2_set_locking_protocol();

2
fs/ocfs2/xattr.c
View File

@ -1284,7 +1284,7 @@ int ocfs2_xattr_get_nolock(struct inode *inode,
return -EOPNOTSUPP;
if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
ret = -ENODATA;
return -ENODATA;
xis.inode_bh = xbs.inode_bh = di_bh;
di = (struct ocfs2_dinode *)di_bh->b_data;

47
fs/proc/array.c
View File

@ -157,20 +157,29 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
struct user_namespace *user_ns = seq_user_ns(m);
struct group_info *group_info;
int g;
struct fdtable *fdt = NULL;
struct task_struct *tracer;
const struct cred *cred;
pid_t ppid, tpid;
pid_t ppid, tpid = 0, tgid, ngid;
unsigned int max_fds = 0;
rcu_read_lock();
ppid = pid_alive(p) ?
task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
tpid = 0;
if (pid_alive(p)) {
struct task_struct *tracer = ptrace_parent(p);
if (tracer)
tpid = task_pid_nr_ns(tracer, ns);
}
tracer = ptrace_parent(p);
if (tracer)
tpid = task_pid_nr_ns(tracer, ns);
tgid = task_tgid_nr_ns(p, ns);
ngid = task_numa_group_id(p);
cred = get_task_cred(p);
task_lock(p);
if (p->files)
max_fds = files_fdtable(p->files)->max_fds;
task_unlock(p);
rcu_read_unlock();
seq_printf(m,
"State:\t%s\n"
"Tgid:\t%d\n"
@ -179,12 +188,10 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
"PPid:\t%d\n"
"TracerPid:\t%d\n"
"Uid:\t%d\t%d\t%d\t%d\n"
"Gid:\t%d\t%d\t%d\t%d\n",
"Gid:\t%d\t%d\t%d\t%d\n"
"FDSize:\t%d\nGroups:\t",
get_task_state(p),
task_tgid_nr_ns(p, ns),
task_numa_group_id(p),
pid_nr_ns(pid, ns),
ppid, tpid,
tgid, ngid, pid_nr_ns(pid, ns), ppid, tpid,
from_kuid_munged(user_ns, cred->uid),
from_kuid_munged(user_ns, cred->euid),
from_kuid_munged(user_ns, cred->suid),
@ -192,20 +199,10 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
from_kgid_munged(user_ns, cred->gid),
from_kgid_munged(user_ns, cred->egid),
from_kgid_munged(user_ns, cred->sgid),
from_kgid_munged(user_ns, cred->fsgid));
task_lock(p);
if (p->files)
fdt = files_fdtable(p->files);
seq_printf(m,
"FDSize:\t%d\n"
"Groups:\t",
fdt ? fdt->max_fds : 0);
rcu_read_unlock();
from_kgid_munged(user_ns, cred->fsgid),
max_fds);
group_info = cred->group_info;
task_unlock(p);
for (g = 0; g < group_info->ngroups; g++)
seq_printf(m, "%d ",
from_kgid_munged(user_ns, GROUP_AT(group_info, g)));

3
fs/proc/base.c
View File

@ -2618,6 +2618,9 @@ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
dput(dentry);
}
if (pid == tgid)
return;
name.name = buf;
name.len = snprintf(buf, sizeof(buf), "%d", tgid);
leader = d_hash_and_lookup(mnt->mnt_root, &name);

163
fs/proc/generic.c
View File

@ -31,9 +31,73 @@ static DEFINE_SPINLOCK(proc_subdir_lock);
static int proc_match(unsigned int len, const char *name, struct proc_dir_entry *de)
{
if (de->namelen != len)
return 0;
return !memcmp(name, de->name, len);
if (len < de->namelen)
return -1;
if (len > de->namelen)
return 1;
return memcmp(name, de->name, len);
}
static struct proc_dir_entry *pde_subdir_first(struct proc_dir_entry *dir)
{
return rb_entry_safe(rb_first(&dir->subdir), struct proc_dir_entry,
subdir_node);
}
static struct proc_dir_entry *pde_subdir_next(struct proc_dir_entry *dir)
{
return rb_entry_safe(rb_next(&dir->subdir_node), struct proc_dir_entry,
subdir_node);
}
static struct proc_dir_entry *pde_subdir_find(struct proc_dir_entry *dir,
const char *name,
unsigned int len)
{
struct rb_node *node = dir->subdir.rb_node;
while (node) {
struct proc_dir_entry *de = container_of(node,
struct proc_dir_entry,
subdir_node);
int result = proc_match(len, name, de);
if (result < 0)
node = node->rb_left;
else if (result > 0)
node = node->rb_right;
else
return de;
}
return NULL;
}
static bool pde_subdir_insert(struct proc_dir_entry *dir,
struct proc_dir_entry *de)
{
struct rb_root *root = &dir->subdir;
struct rb_node **new = &root->rb_node, *parent = NULL;
/* Figure out where to put new node */
while (*new) {
struct proc_dir_entry *this =
container_of(*new, struct proc_dir_entry, subdir_node);
int result = proc_match(de->namelen, de->name, this);
parent = *new;
if (result < 0)
new = &(*new)->rb_left;
else if (result > 0)
new = &(*new)->rb_right;
else
return false;
}
/* Add new node and rebalance tree. */
rb_link_node(&de->subdir_node, parent, new);
rb_insert_color(&de->subdir_node, root);
return true;
}
static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
@ -92,10 +156,7 @@ static int __xlate_proc_name(const char *name, struct proc_dir_entry **ret,
break;
len = next - cp;
for (de = de->subdir; de ; de = de->next) {
if (proc_match(len, cp, de))
break;
}
de = pde_subdir_find(de, cp, len);
if (!de) {
WARN(1, "name '%s'\n", name);
return -ENOENT;
@ -183,19 +244,16 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
struct inode *inode;
spin_lock(&proc_subdir_lock);
for (de = de->subdir; de ; de = de->next) {
if (de->namelen != dentry->d_name.len)
continue;
if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
pde_get(de);
spin_unlock(&proc_subdir_lock);
inode = proc_get_inode(dir->i_sb, de);
if (!inode)
return ERR_PTR(-ENOMEM);
d_set_d_op(dentry, &simple_dentry_operations);
d_add(dentry, inode);
return NULL;
}
de = pde_subdir_find(de, dentry->d_name.name, dentry->d_name.len);
if (de) {
pde_get(de);
spin_unlock(&proc_subdir_lock);
inode = proc_get_inode(dir->i_sb, de);
if (!inode)
return ERR_PTR(-ENOMEM);
d_set_d_op(dentry, &simple_dentry_operations);
d_add(dentry, inode);
return NULL;
}
spin_unlock(&proc_subdir_lock);
return ERR_PTR(-ENOENT);
@ -225,7 +283,7 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *file,
return 0;
spin_lock(&proc_subdir_lock);
de = de->subdir;
de = pde_subdir_first(de);
i = ctx->pos - 2;
for (;;) {
if (!de) {
@ -234,7 +292,7 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *file,
}
if (!i)
break;
de = de->next;
de = pde_subdir_next(de);
i--;
}
@ -249,7 +307,7 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *file,
}
spin_lock(&proc_subdir_lock);
ctx->pos++;
next = de->next;
next = pde_subdir_next(de);
pde_put(de);
de = next;
} while (de);
@ -286,9 +344,8 @@ static const struct inode_operations proc_dir_inode_operations = {
static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp)
{
struct proc_dir_entry *tmp;
int ret;
ret = proc_alloc_inum(&dp->low_ino);
if (ret)
return ret;
@ -304,21 +361,21 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp
dp->proc_iops = &proc_file_inode_operations;
} else {
WARN_ON(1);
proc_free_inum(dp->low_ino);
return -EINVAL;
}
spin_lock(&proc_subdir_lock);
for (tmp = dir->subdir; tmp; tmp = tmp->next)
if (strcmp(tmp->name, dp->name) == 0) {
WARN(1, "proc_dir_entry '%s/%s' already registered\n",
dir->name, dp->name);
break;
}
dp->next = dir->subdir;
dp->parent = dir;
dir->subdir = dp;
if (pde_subdir_insert(dir, dp) == false) {
WARN(1, "proc_dir_entry '%s/%s' already registered\n",
dir->name, dp->name);
spin_unlock(&proc_subdir_lock);
if (S_ISDIR(dp->mode))
dir->nlink--;
proc_free_inum(dp->low_ino);
return -EEXIST;
}
spin_unlock(&proc_subdir_lock);
return 0;
@ -354,6 +411,7 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
ent->namelen = qstr.len;
ent->mode = mode;
ent->nlink = nlink;
ent->subdir = RB_ROOT;
atomic_set(&ent->count, 1);
spin_lock_init(&ent->pde_unload_lock);
INIT_LIST_HEAD(&ent->pde_openers);
@ -485,7 +543,6 @@ void pde_put(struct proc_dir_entry *pde)
*/
void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
{
struct proc_dir_entry **p;
struct proc_dir_entry *de = NULL;
const char *fn = name;
unsigned int len;
@ -497,14 +554,9 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
}
len = strlen(fn);
for (p = &parent->subdir; *p; p=&(*p)->next ) {
if (proc_match(len, fn, *p)) {
de = *p;
*p = de->next;
de->next = NULL;
break;
}
}
de = pde_subdir_find(parent, fn, len);
if (de)
rb_erase(&de->subdir_node, &parent->subdir);
spin_unlock(&proc_subdir_lock);
if (!de) {
WARN(1, "name '%s'\n", name);
@ -516,16 +568,15 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
if (S_ISDIR(de->mode))
parent->nlink--;
de->nlink = 0;
WARN(de->subdir, "%s: removing non-empty directory "
"'%s/%s', leaking at least '%s'\n", __func__,
de->parent->name, de->name, de->subdir->name);
WARN(pde_subdir_first(de),
"%s: removing non-empty directory '%s/%s', leaking at least '%s'\n",
__func__, de->parent->name, de->name, pde_subdir_first(de)->name);
pde_put(de);
}
EXPORT_SYMBOL(remove_proc_entry);
int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
{
struct proc_dir_entry **p;
struct proc_dir_entry *root = NULL, *de, *next;
const char *fn = name;
unsigned int len;
@ -537,24 +588,18 @@ int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
}
len = strlen(fn);
for (p = &parent->subdir; *p; p=&(*p)->next ) {
if (proc_match(len, fn, *p)) {
root = *p;
*p = root->next;
root->next = NULL;
break;
}
}
root = pde_subdir_find(parent, fn, len);
if (!root) {
spin_unlock(&proc_subdir_lock);
return -ENOENT;
}
rb_erase(&root->subdir_node, &parent->subdir);
de = root;
while (1) {
next = de->subdir;
next = pde_subdir_first(de);
if (next) {
de->subdir = next->next;
next->next = NULL;
rb_erase(&next->subdir_node, &de->subdir);
de = next;
continue;
}

11
fs/proc/internal.h
View File

@ -24,10 +24,9 @@ struct mempolicy;
* tree) of these proc_dir_entries, so that we can dynamically
* add new files to /proc.
*
* The "next" pointer creates a linked list of one /proc directory,
* while parent/subdir create the directory structure (every
* /proc file has a parent, but "subdir" is NULL for all
* non-directory entries).
* parent/subdir are used for the directory structure (every /proc file has a
* parent, but "subdir" is empty for all non-directory entries).
* subdir_node is used to build the rb tree "subdir" of the parent.
*/
struct proc_dir_entry {
unsigned int low_ino;
@ -38,7 +37,9 @@ struct proc_dir_entry {
loff_t size;
const struct inode_operations *proc_iops;
const struct file_operations *proc_fops;
struct proc_dir_entry *next, *parent, *subdir;
struct proc_dir_entry *parent;
struct rb_root subdir;
struct rb_node subdir_node;
void *data;
atomic_t count; /* use count */
atomic_t in_use; /* number of callers into module in progress; */

1
fs/proc/proc_net.c
View File

@ -192,6 +192,7 @@ static __net_init int proc_net_ns_init(struct net *net)
if (!netd)
goto out;
netd->subdir = RB_ROOT;
netd->data = net;
netd->nlink = 2;
netd->namelen = 3;

1
fs/proc/root.c
View File

@ -251,6 +251,7 @@ struct proc_dir_entry proc_root = {
.proc_iops = &proc_root_inode_operations,
.proc_fops = &proc_root_operations,
.parent = &proc_root,
.subdir = RB_ROOT,
.name = "/proc",
};

104
fs/proc/task_mmu.c
View File

@ -447,59 +447,92 @@ struct mem_size_stats {
u64 pss;
};
static void smaps_account(struct mem_size_stats *mss, struct page *page,
unsigned long size, bool young, bool dirty)
{
int mapcount;
static void smaps_pte_entry(pte_t ptent, unsigned long addr,
unsigned long ptent_size, struct mm_walk *walk)
if (PageAnon(page))
mss->anonymous += size;
mss->resident += size;
/* Accumulate the size in pages that have been accessed. */
if (young || PageReferenced(page))
mss->referenced += size;
mapcount = page_mapcount(page);
if (mapcount >= 2) {
u64 pss_delta;
if (dirty || PageDirty(page))
mss->shared_dirty += size;
else
mss->shared_clean += size;
pss_delta = (u64)size << PSS_SHIFT;
do_div(pss_delta, mapcount);
mss->pss += pss_delta;
} else {
if (dirty || PageDirty(page))
mss->private_dirty += size;
else
mss->private_clean += size;
mss->pss += (u64)size << PSS_SHIFT;
}
}
static void smaps_pte_entry(pte_t *pte, unsigned long addr,
struct mm_walk *walk)
{
struct mem_size_stats *mss = walk->private;
struct vm_area_struct *vma = mss->vma;
pgoff_t pgoff = linear_page_index(vma, addr);
struct page *page = NULL;
int mapcount;
if (pte_present(ptent)) {
page = vm_normal_page(vma, addr, ptent);
} else if (is_swap_pte(ptent)) {
swp_entry_t swpent = pte_to_swp_entry(ptent);
if (pte_present(*pte)) {
page = vm_normal_page(vma, addr, *pte);
} else if (is_swap_pte(*pte)) {
swp_entry_t swpent = pte_to_swp_entry(*pte);
if (!non_swap_entry(swpent))
mss->swap += ptent_size;
mss->swap += PAGE_SIZE;
else if (is_migration_entry(swpent))
page = migration_entry_to_page(swpent);
} else if (pte_file(ptent)) {
if (pte_to_pgoff(ptent) != pgoff)
mss->nonlinear += ptent_size;
} else if (pte_file(*pte)) {
if (pte_to_pgoff(*pte) != pgoff)
mss->nonlinear += PAGE_SIZE;
}
if (!page)
return;
if (PageAnon(page))
mss->anonymous += ptent_size;
if (page->index != pgoff)
mss->nonlinear += ptent_size;
mss->nonlinear += PAGE_SIZE;
mss->resident += ptent_size;
/* Accumulate the size in pages that have been accessed. */
if (pte_young(ptent) || PageReferenced(page))
mss->referenced += ptent_size;
mapcount = page_mapcount(page);
if (mapcount >= 2) {
if (pte_dirty(ptent) || PageDirty(page))
mss->shared_dirty += ptent_size;
else
mss->shared_clean += ptent_size;
mss->pss += (ptent_size << PSS_SHIFT) / mapcount;
} else {
if (pte_dirty(ptent) || PageDirty(page))
mss->private_dirty += ptent_size;
else
mss->private_clean += ptent_size;
mss->pss += (ptent_size << PSS_SHIFT);
}
smaps_account(mss, page, PAGE_SIZE, pte_young(*pte), pte_dirty(*pte));
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static void smaps_pmd_entry(pmd_t *pmd, unsigned long addr,
struct mm_walk *walk)
{
struct mem_size_stats *mss = walk->private;
struct vm_area_struct *vma = mss->vma;
struct page *page;
/* FOLL_DUMP will return -EFAULT on huge zero page */
page = follow_trans_huge_pmd(vma, addr, pmd, FOLL_DUMP);
if (IS_ERR_OR_NULL(page))
return;
mss->anonymous_thp += HPAGE_PMD_SIZE;
smaps_account(mss, page, HPAGE_PMD_SIZE,
pmd_young(*pmd), pmd_dirty(*pmd));
}
#else
static void smaps_pmd_entry(pmd_t *pmd, unsigned long addr,
struct mm_walk *walk)
{
}
#endif
static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
struct mm_walk *walk)
{
@ -509,9 +542,8 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
spinlock_t *ptl;
if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) {
smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_PMD_SIZE, walk);
smaps_pmd_entry(pmd, addr, walk);
spin_unlock(ptl);
mss->anonymous_thp += HPAGE_PMD_SIZE;
return 0;
}
@ -524,7 +556,7 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
*/
pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
for (; addr != end; pte++, addr += PAGE_SIZE)
smaps_pte_entry(*pte, addr, PAGE_SIZE, walk);
smaps_pte_entry(pte, addr, walk);
pte_unmap_unlock(pte - 1, ptl);
cond_resched();
return 0;

26
include/linux/cgroup.h
View File

@ -112,6 +112,19 @@ static inline void css_get(struct cgroup_subsys_state *css)
percpu_ref_get(&css->refcnt);
}
/**
* css_get_many - obtain references on the specified css
* @css: target css
* @n: number of references to get
*
* The caller must already have a reference.
*/
static inline void css_get_many(struct cgroup_subsys_state *css, unsigned int n)
{
if (!(css->flags & CSS_NO_REF))
percpu_ref_get_many(&css->refcnt, n);
}
/**
* css_tryget - try to obtain a reference on the specified css
* @css: target css
@ -159,6 +172,19 @@ static inline void css_put(struct cgroup_subsys_state *css)
percpu_ref_put(&css->refcnt);
}
/**
* css_put_many - put css references
* @css: target css
* @n: number of references to put
*
* Put references obtained via css_get() and css_tryget_online().
*/
static inline void css_put_many(struct cgroup_subsys_state *css, unsigned int n)
{
if (!(css->flags & CSS_NO_REF))
percpu_ref_put_many(&css->refcnt, n);
}
/* bits in struct cgroup flags field */
enum {
/* Control Group requires release notifications to userspace */

10
include/linux/compaction.h
View File

@ -33,10 +33,11 @@ extern int fragmentation_index(struct zone *zone, unsigned int order);
extern unsigned long try_to_compact_pages(struct zonelist *zonelist,
int order, gfp_t gfp_mask, nodemask_t *mask,
enum migrate_mode mode, int *contended,
struct zone **candidate_zone);
int alloc_flags, int classzone_idx);
extern void compact_pgdat(pg_data_t *pgdat, int order);
extern void reset_isolation_suitable(pg_data_t *pgdat);
extern unsigned long compaction_suitable(struct zone *zone, int order);
extern unsigned long compaction_suitable(struct zone *zone, int order,
int alloc_flags, int classzone_idx);
/* Do not skip compaction more than 64 times */
#define COMPACT_MAX_DEFER_SHIFT 6
@ -103,7 +104,7 @@ static inline bool compaction_restarting(struct zone *zone, int order)
static inline unsigned long try_to_compact_pages(struct zonelist *zonelist,
int order, gfp_t gfp_mask, nodemask_t *nodemask,
enum migrate_mode mode, int *contended,
struct zone **candidate_zone)
int alloc_flags, int classzone_idx)
{
return COMPACT_CONTINUE;
}
@ -116,7 +117,8 @@ static inline void reset_isolation_suitable(pg_data_t *pgdat)
{
}
static inline unsigned long compaction_suitable(struct zone *zone, int order)
static inline unsigned long compaction_suitable(struct zone *zone, int order,
int alloc_flags, int classzone_idx)
{
return COMPACT_SKIPPED;
}

1
include/linux/file.h
View File

@ -66,7 +66,6 @@ extern void set_close_on_exec(unsigned int fd, int flag);
extern bool get_close_on_exec(unsigned int fd);
extern void put_filp(struct file *);
extern int get_unused_fd_flags(unsigned flags);
#define get_unused_fd() get_unused_fd_flags(0)
extern void put_unused_fd(unsigned int fd);
extern void fd_install(unsigned int fd, struct file *file);

4
include/linux/gfp.h
View File

@ -381,8 +381,8 @@ extern void free_kmem_pages(unsigned long addr, unsigned int order);
void page_alloc_init(void);
void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp);
void drain_all_pages(void);
void drain_local_pages(void *dummy);
void drain_all_pages(struct zone *zone);
void drain_local_pages(struct zone *zone);
/*
* gfp_allowed_mask is set to GFP_BOOT_MASK during early boot to restrict what

3
include/linux/hugetlb.h
View File

@ -311,7 +311,8 @@ static inline struct hstate *hstate_sizelog(int page_size_log)
{
if (!page_size_log)
return &default_hstate;
return size_to_hstate(1 << page_size_log);
return size_to_hstate(1UL << page_size_log);
}
static inline struct hstate *hstate_vma(struct vm_area_struct *vma)

1
include/linux/hugetlb_cgroup.h
View File

@ -16,7 +16,6 @@
#define _LINUX_HUGETLB_CGROUP_H
#include <linux/mmdebug.h>
#include <linux/res_counter.h>
struct hugetlb_cgroup;
/*

13
include/linux/kern_levels.h
View File

@ -22,4 +22,17 @@
*/
#define KERN_CONT ""
/* integer equivalents of KERN_<LEVEL> */
#define LOGLEVEL_SCHED -2 /* Deferred messages from sched code
* are set to this special level */
#define LOGLEVEL_DEFAULT -1 /* default (or last) loglevel */
#define LOGLEVEL_EMERG 0 /* system is unusable */
#define LOGLEVEL_ALERT 1 /* action must be taken immediately */
#define LOGLEVEL_CRIT 2 /* critical conditions */
#define LOGLEVEL_ERR 3 /* error conditions */
#define LOGLEVEL_WARNING 4 /* warning conditions */
#define LOGLEVEL_NOTICE 5 /* normal but significant condition */
#define LOGLEVEL_INFO 6 /* informational */
#define LOGLEVEL_DEBUG 7 /* debug-level messages */
#endif

1
include/linux/kernel.h
View File

@ -427,6 +427,7 @@ extern int panic_timeout;
extern int panic_on_oops;
extern int panic_on_unrecovered_nmi;
extern int panic_on_io_nmi;
extern int panic_on_warn;
extern int sysctl_panic_on_stackoverflow;
/*
* Only to be used by arch init code. If the user over-wrote the default

50
include/linux/memcontrol.h
View File

@ -25,7 +25,6 @@
#include <linux/jump_label.h>
struct mem_cgroup;
struct page_cgroup;
struct page;
struct mm_struct;
struct kmem_cache;
@ -68,10 +67,9 @@ void mem_cgroup_migrate(struct page *oldpage, struct page *newpage,
struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *);
bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
struct mem_cgroup *memcg);
bool task_in_mem_cgroup(struct task_struct *task,
const struct mem_cgroup *memcg);
bool mem_cgroup_is_descendant(struct mem_cgroup *memcg,
struct mem_cgroup *root);
bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg);
extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
@ -79,15 +77,16 @@ extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
extern struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css);
static inline
bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg)
static inline bool mm_match_cgroup(struct mm_struct *mm,
struct mem_cgroup *memcg)
{
struct mem_cgroup *task_memcg;
bool match;
bool match = false;
rcu_read_lock();
task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
match = __mem_cgroup_same_or_subtree(memcg, task_memcg);
if (task_memcg)
match = mem_cgroup_is_descendant(task_memcg, memcg);
rcu_read_unlock();
return match;
}
@ -141,8 +140,8 @@ static inline bool mem_cgroup_disabled(void)
struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page, bool *locked,
unsigned long *flags);
void mem_cgroup_end_page_stat(struct mem_cgroup *memcg, bool locked,
unsigned long flags);
void mem_cgroup_end_page_stat(struct mem_cgroup *memcg, bool *locked,
unsigned long *flags);
void mem_cgroup_update_page_stat(struct mem_cgroup *memcg,
enum mem_cgroup_stat_index idx, int val);
@ -174,10 +173,6 @@ static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
void mem_cgroup_split_huge_fixup(struct page *head);
#endif
#ifdef CONFIG_DEBUG_VM
bool mem_cgroup_bad_page_check(struct page *page);
void mem_cgroup_print_bad_page(struct page *page);
#endif
#else /* CONFIG_MEMCG */
struct mem_cgroup;
@ -297,7 +292,7 @@ static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page,
}
static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg,
bool locked, unsigned long flags)
bool *locked, unsigned long *flags)
{
}
@ -347,19 +342,6 @@ void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
}
#endif /* CONFIG_MEMCG */
#if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM)
static inline bool
mem_cgroup_bad_page_check(struct page *page)
{
return false;
}
static inline void
mem_cgroup_print_bad_page(struct page *page)
{
}
#endif
enum {
UNDER_LIMIT,
SOFT_LIMIT,
@ -447,9 +429,8 @@ memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
/*
* __GFP_NOFAIL allocations will move on even if charging is not
* possible. Therefore we don't even try, and have this allocation
* unaccounted. We could in theory charge it with
* res_counter_charge_nofail, but we hope those allocations are rare,
* and won't be worth the trouble.
* unaccounted. We could in theory charge it forcibly, but we hope
* those allocations are rare, and won't be worth the trouble.
*/
if (gfp & __GFP_NOFAIL)
return true;
@ -467,8 +448,6 @@ memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
* memcg_kmem_uncharge_pages: uncharge pages from memcg
* @page: pointer to struct page being freed
* @order: allocation order.
*
* there is no need to specify memcg here, since it is embedded in page_cgroup
*/
static inline void
memcg_kmem_uncharge_pages(struct page *page, int order)
@ -485,8 +464,7 @@ memcg_kmem_uncharge_pages(struct page *page, int order)
*
* Needs to be called after memcg_kmem_newpage_charge, regardless of success or
* failure of the allocation. if @page is NULL, this function will revert the
* charges. Otherwise, it will commit the memcg given by @memcg to the
* corresponding page_cgroup.
* charges. Otherwise, it will commit @page to @memcg.
*/
static inline void
memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)

5
include/linux/mm_types.h
View File

@ -22,6 +22,7 @@
#define AT_VECTOR_SIZE (2*(AT_VECTOR_SIZE_ARCH + AT_VECTOR_SIZE_BASE + 1))
struct address_space;
struct mem_cgroup;
#define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
#define USE_SPLIT_PMD_PTLOCKS (USE_SPLIT_PTE_PTLOCKS && \
@ -167,6 +168,10 @@ struct page {
struct page *first_page; /* Compound tail pages */
};
#ifdef CONFIG_MEMCG
struct mem_cgroup *mem_cgroup;
#endif
/*
* On machines where all RAM is mapped into kernel address space,
* we can simply calculate the virtual address. On machines with

12
include/linux/mmzone.h
View File

@ -722,9 +722,6 @@ typedef struct pglist_data {
int nr_zones;
#ifdef CONFIG_FLAT_NODE_MEM_MAP /* means !SPARSEMEM */
struct page *node_mem_map;
#ifdef CONFIG_MEMCG
struct page_cgroup *node_page_cgroup;
#endif
#endif
#ifndef CONFIG_NO_BOOTMEM
struct bootmem_data *bdata;
@ -1078,7 +1075,6 @@ static inline unsigned long early_pfn_to_nid(unsigned long pfn)
#define SECTION_ALIGN_DOWN(pfn) ((pfn) & PAGE_SECTION_MASK)
struct page;
struct page_cgroup;
struct mem_section {
/*
* This is, logically, a pointer to an array of struct
@ -1096,14 +1092,6 @@ struct mem_section {
/* See declaration of similar field in struct zone */
unsigned long *pageblock_flags;
#ifdef CONFIG_MEMCG
/*
* If !SPARSEMEM, pgdat doesn't have page_cgroup pointer. We use
* section. (see memcontrol.h/page_cgroup.h about this.)
*/
struct page_cgroup *page_cgroup;
unsigned long pad;
#endif
/*
* WARNING: mem_section must be a power-of-2 in size for the
* calculation and use of SECTION_ROOT_MASK to make sense.

105
include/linux/page_cgroup.h
View File

@ -1,105 +0,0 @@
#ifndef __LINUX_PAGE_CGROUP_H
#define __LINUX_PAGE_CGROUP_H
enum {
/* flags for mem_cgroup */
PCG_USED = 0x01, /* This page is charged to a memcg */
PCG_MEM = 0x02, /* This page holds a memory charge */
PCG_MEMSW = 0x04, /* This page holds a memory+swap charge */
};
struct pglist_data;
#ifdef CONFIG_MEMCG
struct mem_cgroup;
/*
* Page Cgroup can be considered as an extended mem_map.
* A page_cgroup page is associated with every page descriptor. The
* page_cgroup helps us identify information about the cgroup
* All page cgroups are allocated at boot or memory hotplug event,
* then the page cgroup for pfn always exists.
*/
struct page_cgroup {
unsigned long flags;
struct mem_cgroup *mem_cgroup;
};
extern void pgdat_page_cgroup_init(struct pglist_data *pgdat);
#ifdef CONFIG_SPARSEMEM
static inline void page_cgroup_init_flatmem(void)
{
}
extern void page_cgroup_init(void);
#else
extern void page_cgroup_init_flatmem(void);
static inline void page_cgroup_init(void)
{
}
#endif
struct page_cgroup *lookup_page_cgroup(struct page *page);
static inline int PageCgroupUsed(struct page_cgroup *pc)
{
return !!(pc->flags & PCG_USED);
}
#else /* !CONFIG_MEMCG */
struct page_cgroup;
static inline void pgdat_page_cgroup_init(struct pglist_data *pgdat)
{
}
static inline struct page_cgroup *lookup_page_cgroup(struct page *page)
{
return NULL;
}
static inline void page_cgroup_init(void)
{
}
static inline void page_cgroup_init_flatmem(void)
{
}
#endif /* CONFIG_MEMCG */
#include <linux/swap.h>
#ifdef CONFIG_MEMCG_SWAP
extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
unsigned short old, unsigned short new);
extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
extern int swap_cgroup_swapon(int type, unsigned long max_pages);
extern void swap_cgroup_swapoff(int type);
#else
static inline
unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
{
return 0;
}
static inline
unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
{
return 0;
}
static inline int
swap_cgroup_swapon(int type, unsigned long max_pages)
{
return 0;
}
static inline void swap_cgroup_swapoff(int type)
{
return;
}
#endif /* CONFIG_MEMCG_SWAP */
#endif /* __LINUX_PAGE_CGROUP_H */

51
include/linux/page_counter.h 100644
View File

@ -0,0 +1,51 @@
#ifndef _LINUX_PAGE_COUNTER_H
#define _LINUX_PAGE_COUNTER_H
#include <linux/atomic.h>
#include <linux/kernel.h>
#include <asm/page.h>
struct page_counter {
atomic_long_t count;
unsigned long limit;
struct page_counter *parent;
/* legacy */
unsigned long watermark;
unsigned long failcnt;
};
#if BITS_PER_LONG == 32
#define PAGE_COUNTER_MAX LONG_MAX
#else
#define PAGE_COUNTER_MAX (LONG_MAX / PAGE_SIZE)
#endif
static inline void page_counter_init(struct page_counter *counter,
struct page_counter *parent)
{
atomic_long_set(&counter->count, 0);
counter->limit = PAGE_COUNTER_MAX;
counter->parent = parent;
}
static inline unsigned long page_counter_read(struct page_counter *counter)
{
return atomic_long_read(&counter->count);
}
void page_counter_cancel(struct page_counter *counter, unsigned long nr_pages);
void page_counter_charge(struct page_counter *counter, unsigned long nr_pages);
int page_counter_try_charge(struct page_counter *counter,
unsigned long nr_pages,
struct page_counter **fail);
void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages);
int page_counter_limit(struct page_counter *counter, unsigned long limit);
int page_counter_memparse(const char *buf, unsigned long *nr_pages);
static inline void page_counter_reset_watermark(struct page_counter *counter)
{
counter->watermark = page_counter_read(counter);
}
#endif /* _LINUX_PAGE_COUNTER_H */

69
include/linux/percpu-refcount.h
View File

@ -146,6 +146,29 @@ static inline bool __ref_is_percpu(struct percpu_ref *ref,
return true;
}
/**
* percpu_ref_get_many - increment a percpu refcount
* @ref: percpu_ref to get
* @nr: number of references to get
*
* Analogous to atomic_long_add().
*
* This function is safe to call as long as @ref is between init and exit.
*/
static inline void percpu_ref_get_many(struct percpu_ref *ref, unsigned long nr)
{
unsigned long __percpu *percpu_count;
rcu_read_lock_sched();
if (__ref_is_percpu(ref, &percpu_count))
this_cpu_add(*percpu_count, nr);
else
atomic_long_add(nr, &ref->count);
rcu_read_unlock_sched();
}
/**
* percpu_ref_get - increment a percpu refcount
* @ref: percpu_ref to get
@ -156,16 +179,7 @@ static inline bool __ref_is_percpu(struct percpu_ref *ref,
*/
static inline void percpu_ref_get(struct percpu_ref *ref)
{
unsigned long __percpu *percpu_count;
rcu_read_lock_sched();
if (__ref_is_percpu(ref, &percpu_count))
this_cpu_inc(*percpu_count);
else
atomic_long_inc(&ref->count);
rcu_read_unlock_sched();
percpu_ref_get_many(ref, 1);
}
/**
@ -230,6 +244,30 @@ static inline bool percpu_ref_tryget_live(struct percpu_ref *ref)
return ret;
}
/**
* percpu_ref_put_many - decrement a percpu refcount
* @ref: percpu_ref to put
* @nr: number of references to put
*
* Decrement the refcount, and if 0, call the release function (which was passed
* to percpu_ref_init())
*
* This function is safe to call as long as @ref is between init and exit.
*/
static inline void percpu_ref_put_many(struct percpu_ref *ref, unsigned long nr)
{
unsigned long __percpu *percpu_count;
rcu_read_lock_sched();
if (__ref_is_percpu(ref, &percpu_count))
this_cpu_sub(*percpu_count, nr);
else if (unlikely(atomic_long_sub_and_test(nr, &ref->count)))
ref->release(ref);
rcu_read_unlock_sched();
}
/**
* percpu_ref_put - decrement a percpu refcount
* @ref: percpu_ref to put
@ -241,16 +279,7 @@ static inline bool percpu_ref_tryget_live(struct percpu_ref *ref)
*/
static inline void percpu_ref_put(struct percpu_ref *ref)
{
unsigned long __percpu *percpu_count;
rcu_read_lock_sched();
if (__ref_is_percpu(ref, &percpu_count))
this_cpu_dec(*percpu_count);
else if (unlikely(atomic_long_dec_and_test(&ref->count)))
ref->release(ref);
rcu_read_unlock_sched();
percpu_ref_put_many(ref, 1);
}
/**

1
include/linux/printk.h
View File

@ -118,7 +118,6 @@ int no_printk(const char *fmt, ...)
#ifdef CONFIG_EARLY_PRINTK
extern asmlinkage __printf(1, 2)
void early_printk(const char *fmt, ...);
void early_vprintk(const char *fmt, va_list ap);
#else
static inline __printf(1, 2) __cold
void early_printk(const char *s, ...) { }

2
include/linux/ptrace.h
View File

@ -52,7 +52,7 @@ extern void ptrace_notify(int exit_code);
extern void __ptrace_link(struct task_struct *child,
struct task_struct *new_parent);
extern void __ptrace_unlink(struct task_struct *child);
extern void exit_ptrace(struct task_struct *tracer);
extern void exit_ptrace(struct task_struct *tracer, struct list_head *dead);
#define PTRACE_MODE_READ 0x01
#define PTRACE_MODE_ATTACH 0x02
#define PTRACE_MODE_NOAUDIT 0x04

223
include/linux/res_counter.h
View File

@ -1,223 +0,0 @@
#ifndef __RES_COUNTER_H__
#define __RES_COUNTER_H__
/*
* Resource Counters
* Contain common data types and routines for resource accounting
*
* Copyright 2007 OpenVZ SWsoft Inc
*
* Author: Pavel Emelianov <xemul@openvz.org>
*
* See Documentation/cgroups/resource_counter.txt for more
* info about what this counter is.
*/
#include <linux/spinlock.h>
#include <linux/errno.h>
/*
* The core object. the cgroup that wishes to account for some
* resource may include this counter into its structures and use
* the helpers described beyond
*/
struct res_counter {
/*
* the current resource consumption level
*/
unsigned long long usage;
/*
* the maximal value of the usage from the counter creation
*/
unsigned long long max_usage;
/*
* the limit that usage cannot exceed
*/
unsigned long long limit;
/*
* the limit that usage can be exceed
*/
unsigned long long soft_limit;
/*
* the number of unsuccessful attempts to consume the resource
*/
unsigned long long failcnt;
/*
* the lock to protect all of the above.
* the routines below consider this to be IRQ-safe
*/
spinlock_t lock;
/*
* Parent counter, used for hierarchial resource accounting
*/
struct res_counter *parent;
};
#define RES_COUNTER_MAX ULLONG_MAX
/**
* Helpers to interact with userspace
* res_counter_read_u64() - returns the value of the specified member.
* res_counter_read/_write - put/get the specified fields from the
* res_counter struct to/from the user
*
* @counter: the counter in question
* @member: the field to work with (see RES_xxx below)
* @buf: the buffer to opeate on,...
* @nbytes: its size...
* @pos: and the offset.
*/
u64 res_counter_read_u64(struct res_counter *counter, int member);
ssize_t res_counter_read(struct res_counter *counter, int member,
const char __user *buf, size_t nbytes, loff_t *pos,
int (*read_strategy)(unsigned long long val, char *s));
int res_counter_memparse_write_strategy(const char *buf,
unsigned long long *res);
/*
* the field descriptors. one for each member of res_counter
*/
enum {
RES_USAGE,
RES_MAX_USAGE,
RES_LIMIT,
RES_FAILCNT,
RES_SOFT_LIMIT,
};
/*
* helpers for accounting
*/
void res_counter_init(struct res_counter *counter, struct res_counter *parent);
/*
* charge - try to consume more resource.
*
* @counter: the counter
* @val: the amount of the resource. each controller defines its own
* units, e.g. numbers, bytes, Kbytes, etc
*
* returns 0 on success and <0 if the counter->usage will exceed the
* counter->limit
*
* charge_nofail works the same, except that it charges the resource
* counter unconditionally, and returns < 0 if the after the current
* charge we are over limit.
*/
int __must_check res_counter_charge(struct res_counter *counter,
unsigned long val, struct res_counter **limit_fail_at);
int res_counter_charge_nofail(struct res_counter *counter,
unsigned long val, struct res_counter **limit_fail_at);
/*
* uncharge - tell that some portion of the resource is released
*
* @counter: the counter
* @val: the amount of the resource
*
* these calls check for usage underflow and show a warning on the console
*
* returns the total charges still present in @counter.
*/
u64 res_counter_uncharge(struct res_counter *counter, unsigned long val);
u64 res_counter_uncharge_until(struct res_counter *counter,
struct res_counter *top,
unsigned long val);
/**
* res_counter_margin - calculate chargeable space of a counter
* @cnt: the counter
*
* Returns the difference between the hard limit and the current usage
* of resource counter @cnt.
*/
static inline unsigned long long res_counter_margin(struct res_counter *cnt)
{
unsigned long long margin;
unsigned long flags;
spin_lock_irqsave(&cnt->lock, flags);
if (cnt->limit > cnt->usage)
margin = cnt->limit - cnt->usage;
else
margin = 0;
spin_unlock_irqrestore(&cnt->lock, flags);
return margin;
}
/**
* Get the difference between the usage and the soft limit
* @cnt: The counter
*
* Returns 0 if usage is less than or equal to soft limit
* The difference between usage and soft limit, otherwise.
*/
static inline unsigned long long
res_counter_soft_limit_excess(struct res_counter *cnt)
{
unsigned long long excess;
unsigned long flags;
spin_lock_irqsave(&cnt->lock, flags);
if (cnt->usage <= cnt->soft_limit)
excess = 0;
else
excess = cnt->usage - cnt->soft_limit;
spin_unlock_irqrestore(&cnt->lock, flags);
return excess;
}
static inline void res_counter_reset_max(struct res_counter *cnt)
{
unsigned long flags;
spin_lock_irqsave(&cnt->lock, flags);
cnt->max_usage = cnt->usage;
spin_unlock_irqrestore(&cnt->lock, flags);
}
static inline void res_counter_reset_failcnt(struct res_counter *cnt)
{
unsigned long flags;
spin_lock_irqsave(&cnt->lock, flags);
cnt->failcnt = 0;
spin_unlock_irqrestore(&cnt->lock, flags);
}
static inline int res_counter_set_limit(struct res_counter *cnt,
unsigned long long limit)
{
unsigned long flags;
int ret = -EBUSY;
spin_lock_irqsave(&cnt->lock, flags);
if (cnt->usage <= limit) {
cnt->limit = limit;
ret = 0;
}
spin_unlock_irqrestore(&cnt->lock, flags);
return ret;
}
static inline int
res_counter_set_soft_limit(struct res_counter *cnt,
unsigned long long soft_limit)
{
unsigned long flags;
spin_lock_irqsave(&cnt->lock, flags);
cnt->soft_limit = soft_limit;
spin_unlock_irqrestore(&cnt->lock, flags);
return 0;
}
#endif

4
include/linux/slab.h
View File

@ -513,10 +513,6 @@ struct memcg_cache_params {
int memcg_update_all_caches(int num_memcgs);
struct seq_file;
int cache_show(struct kmem_cache *s, struct seq_file *m);
void print_slabinfo_header(struct seq_file *m);
/**
* kmalloc_array - allocate memory for an array.
* @n: number of elements.

42
include/linux/swap_cgroup.h 100644
View File

@ -0,0 +1,42 @@
#ifndef __LINUX_SWAP_CGROUP_H
#define __LINUX_SWAP_CGROUP_H
#include <linux/swap.h>
#ifdef CONFIG_MEMCG_SWAP
extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
unsigned short old, unsigned short new);
extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
extern int swap_cgroup_swapon(int type, unsigned long max_pages);
extern void swap_cgroup_swapoff(int type);
#else
static inline
unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
{
return 0;
}
static inline
unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
{
return 0;
}
static inline int
swap_cgroup_swapon(int type, unsigned long max_pages)
{
return 0;
}
static inline void swap_cgroup_swapoff(int type)
{
return;
}
#endif /* CONFIG_MEMCG_SWAP */
#endif /* __LINUX_SWAP_CGROUP_H */

26
include/net/sock.h
View File

@ -54,8 +54,8 @@
#include <linux/security.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/page_counter.h>
#include <linux/memcontrol.h>
#include <linux/res_counter.h>
#include <linux/static_key.h>
#include <linux/aio.h>
#include <linux/sched.h>
@ -1062,7 +1062,7 @@ enum cg_proto_flags {
};
struct cg_proto {
struct res_counter memory_allocated; /* Current allocated memory. */
struct page_counter memory_allocated; /* Current allocated memory. */
struct percpu_counter sockets_allocated; /* Current number of sockets. */
int memory_pressure;
long sysctl_mem[3];
@ -1214,34 +1214,26 @@ static inline void memcg_memory_allocated_add(struct cg_proto *prot,
unsigned long amt,
int *parent_status)
{
struct res_counter *fail;
int ret;
page_counter_charge(&prot->memory_allocated, amt);
ret = res_counter_charge_nofail(&prot->memory_allocated,
amt << PAGE_SHIFT, &fail);
if (ret < 0)
if (page_counter_read(&prot->memory_allocated) >
prot->memory_allocated.limit)
*parent_status = OVER_LIMIT;
}
static inline void memcg_memory_allocated_sub(struct cg_proto *prot,
unsigned long amt)
{
res_counter_uncharge(&prot->memory_allocated, amt << PAGE_SHIFT);
}
static inline u64 memcg_memory_allocated_read(struct cg_proto *prot)
{
u64 ret;
ret = res_counter_read_u64(&prot->memory_allocated, RES_USAGE);
return ret >> PAGE_SHIFT;
page_counter_uncharge(&prot->memory_allocated, amt);
}
static inline long
sk_memory_allocated(const struct sock *sk)
{
struct proto *prot = sk->sk_prot;
if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
return memcg_memory_allocated_read(sk->sk_cgrp);
return page_counter_read(&sk->sk_cgrp->memory_allocated);
return atomic_long_read(prot->memory_allocated);
}
@ -1255,7 +1247,7 @@ sk_memory_allocated_add(struct sock *sk, int amt, int *parent_status)
memcg_memory_allocated_add(sk->sk_cgrp, amt, parent_status);
/* update the root cgroup regardless */
atomic_long_add_return(amt, prot->memory_allocated);
return memcg_memory_allocated_read(sk->sk_cgrp);
return page_counter_read(&sk->sk_cgrp->memory_allocated);
}
return atomic_long_add_return(amt, prot->memory_allocated);

1
include/uapi/linux/sysctl.h
View File

@ -153,6 +153,7 @@ enum
KERN_MAX_LOCK_DEPTH=74, /* int: rtmutex's maximum lock depth */
KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
KERN_PANIC_ON_WARN=77, /* int: call panic() in WARN() functions */
};

56
init/Kconfig
View File

@ -893,14 +893,6 @@ config ARCH_SUPPORTS_INT128
config ARCH_WANT_NUMA_VARIABLE_LOCALITY
bool
config NUMA_BALANCING_DEFAULT_ENABLED
bool "Automatically enable NUMA aware memory/task placement"
default y
depends on NUMA_BALANCING
help
If set, automatic NUMA balancing will be enabled if running on a NUMA
machine.
config NUMA_BALANCING
bool "Memory placement aware NUMA scheduler"
depends on ARCH_SUPPORTS_NUMA_BALANCING
@ -913,6 +905,14 @@ config NUMA_BALANCING
This system will be inactive on UMA systems.
config NUMA_BALANCING_DEFAULT_ENABLED
bool "Automatically enable NUMA aware memory/task placement"
default y
depends on NUMA_BALANCING
help
If set, automatic NUMA balancing will be enabled if running on a NUMA
machine.
menuconfig CGROUPS
boolean "Control Group support"
select KERNFS
@ -972,32 +972,17 @@ config CGROUP_CPUACCT
Provides a simple Resource Controller for monitoring the
total CPU consumed by the tasks in a cgroup.
config RESOURCE_COUNTERS
bool "Resource counters"
help
This option enables controller independent resource accounting
infrastructure that works with cgroups.
config PAGE_COUNTER
bool
config MEMCG
bool "Memory Resource Controller for Control Groups"
depends on RESOURCE_COUNTERS
select PAGE_COUNTER
select EVENTFD
help
Provides a memory resource controller that manages both anonymous
memory and page cache. (See Documentation/cgroups/memory.txt)
Note that setting this option increases fixed memory overhead
associated with each page of memory in the system. By this,
8(16)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
usage tracking struct at boot. Total amount of this is printed out
at boot.
Only enable when you're ok with these trade offs and really
sure you need the memory resource controller. Even when you enable
this, you can set "cgroup_disable=memory" at your boot option to
disable memory resource controller and you can avoid overheads.
(and lose benefits of memory resource controller)
config MEMCG_SWAP
bool "Memory Resource Controller Swap Extension"
depends on MEMCG && SWAP
@ -1048,7 +1033,8 @@ config MEMCG_KMEM
config CGROUP_HUGETLB
bool "HugeTLB Resource Controller for Control Groups"
depends on RESOURCE_COUNTERS && HUGETLB_PAGE
depends on HUGETLB_PAGE
select PAGE_COUNTER
default n
help
Provides a cgroup Resource Controller for HugeTLB pages.
@ -1294,6 +1280,22 @@ source "usr/Kconfig"
endif
config INIT_FALLBACK
bool "Fall back to defaults if init= parameter is bad"
default y
help
If enabled, the kernel will try the default init binaries if an
explicit request from the init= parameter fails.
This can have unexpected effects. For example, booting
with init=/sbin/kiosk_app will run /sbin/init or even /bin/sh
if /sbin/kiosk_app cannot be executed.
The default value of Y is consistent with historical behavior.
Selecting N is likely to be more appropriate for most uses,
especially on kiosks and on kernels that are intended to be
run under the control of a script.
config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size"
help

14
init/main.c
View File

@ -51,7 +51,6 @@
#include <linux/mempolicy.h>
#include <linux/key.h>
#include <linux/buffer_head.h>
#include <linux/page_cgroup.h>
#include <linux/debug_locks.h>
#include <linux/debugobjects.h>
#include <linux/lockdep.h>
@ -485,11 +484,6 @@ void __init __weak thread_info_cache_init(void)
*/
static void __init mm_init(void)
{
/*
* page_cgroup requires contiguous pages,
* bigger than MAX_ORDER unless SPARSEMEM.
*/
page_cgroup_init_flatmem();
mem_init();
kmem_cache_init();
percpu_init_late();
@ -627,7 +621,6 @@ asmlinkage __visible void __init start_kernel(void)
initrd_start = 0;
}
#endif
page_cgroup_init();
debug_objects_mem_init();
kmemleak_init();
setup_per_cpu_pageset();
@ -959,8 +952,13 @@ static int __ref kernel_init(void *unused)
ret = run_init_process(execute_command);
if (!ret)
return 0;
#ifndef CONFIG_INIT_FALLBACK
panic("Requested init %s failed (error %d).",
execute_command, ret);
#else
pr_err("Failed to execute %s (error %d). Attempting defaults...\n",
execute_command, ret);
execute_command, ret);
#endif
}
if (!try_to_run_init_process("/sbin/init") ||
!try_to_run_init_process("/etc/init") ||

1
kernel/Makefile
View File

@ -57,7 +57,6 @@ obj-$(CONFIG_UTS_NS) += utsname.o
obj-$(CONFIG_USER_NS) += user_namespace.o
obj-$(CONFIG_PID_NS) += pid_namespace.o
obj-$(CONFIG_IKCONFIG) += configs.o
obj-$(CONFIG_RESOURCE_COUNTERS) += res_counter.o
obj-$(CONFIG_SMP) += stop_machine.o
obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
obj-$(CONFIG_AUDIT) += audit.o auditfilter.o

245
kernel/exit.c
View File

@ -118,13 +118,10 @@ static void __exit_signal(struct task_struct *tsk)
}
/*
* Accumulate here the counters for all threads but the group leader
* as they die, so they can be added into the process-wide totals
* when those are taken. The group leader stays around as a zombie as
* long as there are other threads. When it gets reaped, the exit.c
* code will add its counts into these totals. We won't ever get here
* for the group leader, since it will have been the last reference on
* the signal_struct.
* Accumulate here the counters for all threads as they die. We could
* skip the group leader because it is the last user of signal_struct,
* but we want to avoid the race with thread_group_cputime() which can
* see the empty ->thread_head list.
*/
task_cputime(tsk, &utime, &stime);
write_seqlock(&sig->stats_lock);
@ -462,6 +459,44 @@ static void exit_mm(struct task_struct *tsk)
clear_thread_flag(TIF_MEMDIE);
}
static struct task_struct *find_alive_thread(struct task_struct *p)
{
struct task_struct *t;
for_each_thread(p, t) {
if (!(t->flags & PF_EXITING))
return t;
}
return NULL;
}
static struct task_struct *find_child_reaper(struct task_struct *father)
__releases(&tasklist_lock)
__acquires(&tasklist_lock)
{
struct pid_namespace *pid_ns = task_active_pid_ns(father);
struct task_struct *reaper = pid_ns->child_reaper;
if (likely(reaper != father))
return reaper;
reaper = find_alive_thread(father);
if (reaper) {
pid_ns->child_reaper = reaper;
return reaper;
}
write_unlock_irq(&tasklist_lock);
if (unlikely(pid_ns == &init_pid_ns)) {
panic("Attempted to kill init! exitcode=0x%08x\n",
father->signal->group_exit_code ?: father->exit_code);
}
zap_pid_ns_processes(pid_ns);
write_lock_irq(&tasklist_lock);
return father;
}
/*
* When we die, we re-parent all our children, and try to:
* 1. give them to another thread in our thread group, if such a member exists
@ -469,58 +504,36 @@ static void exit_mm(struct task_struct *tsk)
* child_subreaper for its children (like a service manager)
* 3. give it to the init process (PID 1) in our pid namespace
*/
static struct task_struct *find_new_reaper(struct task_struct *father)
__releases(&tasklist_lock)
__acquires(&tasklist_lock)
static struct task_struct *find_new_reaper(struct task_struct *father,
struct task_struct *child_reaper)
{
struct pid_namespace *pid_ns = task_active_pid_ns(father);
struct task_struct *thread;
struct task_struct *thread, *reaper;
thread = father;
while_each_thread(father, thread) {
if (thread->flags & PF_EXITING)
continue;
if (unlikely(pid_ns->child_reaper == father))
pid_ns->child_reaper = thread;
thread = find_alive_thread(father);
if (thread)
return thread;
}
if (unlikely(pid_ns->child_reaper == father)) {
write_unlock_irq(&tasklist_lock);
if (unlikely(pid_ns == &init_pid_ns)) {
panic("Attempted to kill init! exitcode=0x%08x\n",
father->signal->group_exit_code ?:
father->exit_code);
}
zap_pid_ns_processes(pid_ns);
write_lock_irq(&tasklist_lock);
} else if (father->signal->has_child_subreaper) {
struct task_struct *reaper;
if (father->signal->has_child_subreaper) {
/*
* Find the first ancestor marked as child_subreaper.
* Note that the code below checks same_thread_group(reaper,
* pid_ns->child_reaper). This is what we need to DTRT in a
* PID namespace. However we still need the check above, see
* http://marc.info/?l=linux-kernel&m=131385460420380
* Find the first ->is_child_subreaper ancestor in our pid_ns.
* We start from father to ensure we can not look into another
* namespace, this is safe because all its threads are dead.
*/
for (reaper = father->real_parent;
reaper != &init_task;
for (reaper = father;
!same_thread_group(reaper, child_reaper);
reaper = reaper->real_parent) {
if (same_thread_group(reaper, pid_ns->child_reaper))
/* call_usermodehelper() descendants need this check */
if (reaper == &init_task)
break;
if (!reaper->signal->is_child_subreaper)
continue;
thread = reaper;
do {
if (!(thread->flags & PF_EXITING))
return reaper;
} while_each_thread(reaper, thread);
thread = find_alive_thread(reaper);
if (thread)
return thread;
}
}
return pid_ns->child_reaper;
return child_reaper;
}
/*
@ -529,15 +542,7 @@ static struct task_struct *find_new_reaper(struct task_struct *father)
static void reparent_leader(struct task_struct *father, struct task_struct *p,
struct list_head *dead)
{
list_move_tail(&p->sibling, &p->real_parent->children);
if (p->exit_state == EXIT_DEAD)
return;
/*
* If this is a threaded reparent there is no need to
* notify anyone anything has happened.
*/
if (same_thread_group(p->real_parent, father))
if (unlikely(p->exit_state == EXIT_DEAD))
return;
/* We don't want people slaying init. */
@ -548,49 +553,53 @@ static void reparent_leader(struct task_struct *father, struct task_struct *p,
p->exit_state == EXIT_ZOMBIE && thread_group_empty(p)) {
if (do_notify_parent(p, p->exit_signal)) {
p->exit_state = EXIT_DEAD;
list_move_tail(&p->sibling, dead);
list_add(&p->ptrace_entry, dead);
}
}
kill_orphaned_pgrp(p, father);
}
static void forget_original_parent(struct task_struct *father)
/*
* This does two things:
*
* A. Make init inherit all the child processes
* B. Check to see if any process groups have become orphaned
* as a result of our exiting, and if they have any stopped
* jobs, send them a SIGHUP and then a SIGCONT. (POSIX 3.2.2.2)
*/
static void forget_original_parent(struct task_struct *father,
struct list_head *dead)
{
struct task_struct *p, *n, *reaper;
LIST_HEAD(dead_children);
struct task_struct *p, *t, *reaper;
write_lock_irq(&tasklist_lock);
/*
* Note that exit_ptrace() and find_new_reaper() might
* drop tasklist_lock and reacquire it.
*/
exit_ptrace(father);
reaper = find_new_reaper(father);
if (unlikely(!list_empty(&father->ptraced)))
exit_ptrace(father, dead);
list_for_each_entry_safe(p, n, &father->children, sibling) {
struct task_struct *t = p;
/* Can drop and reacquire tasklist_lock */
reaper = find_child_reaper(father);
if (list_empty(&father->children))
return;
do {
reaper = find_new_reaper(father, reaper);
list_for_each_entry(p, &father->children, sibling) {
for_each_thread(p, t) {
t->real_parent = reaper;
if (t->parent == father) {
BUG_ON(t->ptrace);
BUG_ON((!t->ptrace) != (t->parent == father));
if (likely(!t->ptrace))
t->parent = t->real_parent;
}
if (t->pdeath_signal)
group_send_sig_info(t->pdeath_signal,
SEND_SIG_NOINFO, t);
} while_each_thread(p, t);
reparent_leader(father, p, &dead_children);
}
write_unlock_irq(&tasklist_lock);
BUG_ON(!list_empty(&father->children));
list_for_each_entry_safe(p, n, &dead_children, sibling) {
list_del_init(&p->sibling);
release_task(p);
}
/*
* If this is a threaded reparent there is no need to
* notify anyone anything has happened.
*/
if (!same_thread_group(reaper, father))
reparent_leader(father, p, dead);
}
list_splice_tail_init(&father->children, &reaper->children);
}
/*
@ -600,18 +609,12 @@ static void forget_original_parent(struct task_struct *father)
static void exit_notify(struct task_struct *tsk, int group_dead)
{
bool autoreap;
/*
* This does two things:
*
* A. Make init inherit all the child processes
* B. Check to see if any process groups have become orphaned
* as a result of our exiting, and if they have any stopped
* jobs, send them a SIGHUP and then a SIGCONT. (POSIX 3.2.2.2)
*/
forget_original_parent(tsk);
struct task_struct *p, *n;
LIST_HEAD(dead);
write_lock_irq(&tasklist_lock);
forget_original_parent(tsk, &dead);
if (group_dead)
kill_orphaned_pgrp(tsk->group_leader, NULL);
@ -629,15 +632,18 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
}
tsk->exit_state = autoreap ? EXIT_DEAD : EXIT_ZOMBIE;
if (tsk->exit_state == EXIT_DEAD)
list_add(&tsk->ptrace_entry, &dead);
/* mt-exec, de_thread() is waiting for group leader */
if (unlikely(tsk->signal->notify_count < 0))
wake_up_process(tsk->signal->group_exit_task);
write_unlock_irq(&tasklist_lock);
/* If the process is dead, release it - nobody will wait for it */
if (autoreap)
release_task(tsk);
list_for_each_entry_safe(p, n, &dead, ptrace_entry) {
list_del_init(&p->ptrace_entry);
release_task(p);
}
}
#ifdef CONFIG_DEBUG_STACK_USAGE
@ -982,8 +988,7 @@ static int wait_noreap_copyout(struct wait_opts *wo, struct task_struct *p,
*/
static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
{
unsigned long state;
int retval, status, traced;
int state, retval, status;
pid_t pid = task_pid_vnr(p);
uid_t uid = from_kuid_munged(current_user_ns(), task_uid(p));
struct siginfo __user *infop;
@ -1008,21 +1013,25 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
}
return wait_noreap_copyout(wo, p, pid, uid, why, status);
}
traced = ptrace_reparented(p);
/*
* Move the task's state to DEAD/TRACE, only one thread can do this.
*/
state = traced && thread_group_leader(p) ? EXIT_TRACE : EXIT_DEAD;
state = (ptrace_reparented(p) && thread_group_leader(p)) ?
EXIT_TRACE : EXIT_DEAD;
if (cmpxchg(&p->exit_state, EXIT_ZOMBIE, state) != EXIT_ZOMBIE)
return 0;
/*
* It can be ptraced but not reparented, check
* thread_group_leader() to filter out sub-threads.
* We own this thread, nobody else can reap it.
*/
if (likely(!traced) && thread_group_leader(p)) {
struct signal_struct *psig;
struct signal_struct *sig;
read_unlock(&tasklist_lock);
sched_annotate_sleep();
/*
* Check thread_group_leader() to exclude the traced sub-threads.
*/
if (state == EXIT_DEAD && thread_group_leader(p)) {
struct signal_struct *sig = p->signal;
struct signal_struct *psig = current->signal;
unsigned long maxrss;
cputime_t tgutime, tgstime;
@ -1034,21 +1043,20 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
* accumulate in the parent's signal_struct c* fields.
*
* We don't bother to take a lock here to protect these
* p->signal fields, because they are only touched by
* __exit_signal, which runs with tasklist_lock
* write-locked anyway, and so is excluded here. We do
* need to protect the access to parent->signal fields,
* as other threads in the parent group can be right
* here reaping other children at the same time.
* p->signal fields because the whole thread group is dead
* and nobody can change them.
*
* psig->stats_lock also protects us from our sub-theads
* which can reap other children at the same time. Until
* we change k_getrusage()-like users to rely on this lock
* we have to take ->siglock as well.
*
* We use thread_group_cputime_adjusted() to get times for
* the thread group, which consolidates times for all threads
* in the group including the group leader.
*/
thread_group_cputime_adjusted(p, &tgutime, &tgstime);
spin_lock_irq(&p->real_parent->sighand->siglock);
psig = p->real_parent->signal;
sig = p->signal;
spin_lock_irq(&current->sighand->siglock);
write_seqlock(&psig->stats_lock);
psig->cutime += tgutime + sig->cutime;
psig->cstime += tgstime + sig->cstime;
@ -1073,16 +1081,9 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
task_io_accounting_add(&psig->ioac, &p->ioac);
task_io_accounting_add(&psig->ioac, &sig->ioac);
write_sequnlock(&psig->stats_lock);
spin_unlock_irq(&p->real_parent->sighand->siglock);
spin_unlock_irq(&current->sighand->siglock);
}
/*
* Now we are sure this task is interesting, and no other
* thread can reap it because we its state == DEAD/TRACE.
*/
read_unlock(&tasklist_lock);
sched_annotate_sleep();
retval = wo->wo_rusage
? getrusage(p, RUSAGE_BOTH, wo->wo_rusage) : 0;
status = (p->signal->flags & SIGNAL_GROUP_EXIT)

43
kernel/kmod.c
View File

@ -47,13 +47,6 @@ extern int max_threads;
static struct workqueue_struct *khelper_wq;
/*
* kmod_thread_locker is used for deadlock avoidance. There is no explicit
* locking to protect this global - it is private to the singleton khelper
* thread and should only ever be modified by that thread.
*/
static const struct task_struct *kmod_thread_locker;
#define CAP_BSET (void *)1
#define CAP_PI (void *)2
@ -223,7 +216,6 @@ static void umh_complete(struct subprocess_info *sub_info)
static int ____call_usermodehelper(void *data)
{
struct subprocess_info *sub_info = data;
int wait = sub_info->wait & ~UMH_KILLABLE;
struct cred *new;
int retval;
@ -267,20 +259,13 @@ static int ____call_usermodehelper(void *data)
out:
sub_info->retval = retval;
/* wait_for_helper() will call umh_complete if UHM_WAIT_PROC. */
if (wait != UMH_WAIT_PROC)
if (!(sub_info->wait & UMH_WAIT_PROC))
umh_complete(sub_info);
if (!retval)
return 0;
do_exit(0);
}
static int call_helper(void *data)
{
/* Worker thread started blocking khelper thread. */
kmod_thread_locker = current;
return ____call_usermodehelper(data);
}
/* Keventd can't block, but this (a child) can. */
static int wait_for_helper(void *data)
{
@ -323,21 +308,14 @@ static void __call_usermodehelper(struct work_struct *work)
{
struct subprocess_info *sub_info =
container_of(work, struct subprocess_info, work);
int wait = sub_info->wait & ~UMH_KILLABLE;
pid_t pid;
/* CLONE_VFORK: wait until the usermode helper has execve'd
* successfully We need the data structures to stay around
* until that is done. */
if (wait == UMH_WAIT_PROC)
if (sub_info->wait & UMH_WAIT_PROC)
pid = kernel_thread(wait_for_helper, sub_info,
CLONE_FS | CLONE_FILES | SIGCHLD);
else {
pid = kernel_thread(call_helper, sub_info,
CLONE_VFORK | SIGCHLD);
/* Worker thread stopped blocking khelper thread. */
kmod_thread_locker = NULL;
}
else
pid = kernel_thread(____call_usermodehelper, sub_info,
SIGCHLD);
if (pid < 0) {
sub_info->retval = pid;
@ -570,17 +548,6 @@ int call_usermodehelper_exec(struct subprocess_info *sub_info, int wait)
retval = -EBUSY;
goto out;
}
/*
* Worker thread must not wait for khelper thread at below
* wait_for_completion() if the thread was created with CLONE_VFORK
* flag, for khelper thread is already waiting for the thread at
* wait_for_completion() in do_fork().
*/
if (wait != UMH_NO_WAIT && current == kmod_thread_locker) {
retval = -EBUSY;
goto out;
}
/*
* Set the completion pointer only if there is a waiter.
* This makes it possible to use umh_complete to free

13
kernel/panic.c
View File

@ -33,6 +33,7 @@ static int pause_on_oops;
static int pause_on_oops_flag;
static DEFINE_SPINLOCK(pause_on_oops_lock);
static bool crash_kexec_post_notifiers;
int panic_on_warn __read_mostly;
int panic_timeout = CONFIG_PANIC_TIMEOUT;
EXPORT_SYMBOL_GPL(panic_timeout);
@ -428,6 +429,17 @@ static void warn_slowpath_common(const char *file, int line, void *caller,
if (args)
vprintk(args->fmt, args->args);
if (panic_on_warn) {
/*
* This thread may hit another WARN() in the panic path.
* Resetting this prevents additional WARN() from panicking the
* system on this thread. Other threads are blocked by the
* panic_mutex in panic().
*/
panic_on_warn = 0;
panic("panic_on_warn set ...\n");
}
print_modules();
dump_stack();
print_oops_end_marker();
@ -485,6 +497,7 @@ EXPORT_SYMBOL(__stack_chk_fail);
core_param(panic, panic_timeout, int, 0644);
core_param(pause_on_oops, pause_on_oops, int, 0644);
core_param(panic_on_warn, panic_on_warn, int, 0644);
static int __init setup_crash_kexec_post_notifiers(char *s)
{

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