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Merge branch 'akpm' (incoming from Andrew) 

Merge second patch-bomb from Andrew Morton:
 - the rest of MM
 - zram updates
 - zswap updates
 - exit
 - procfs
 - exec
 - wait
 - crash dump
 - lib/idr
 - rapidio
 - adfs, affs, bfs, ufs
 - cris
 - Kconfig things
 - initramfs
 - small amount of IPC material
 - percpu enhancements
 - early ioremap support
 - various other misc things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (156 commits)
  MAINTAINERS: update Intel C600 SAS driver maintainers
  fs/ufs: remove unused ufs_super_block_third pointer
  fs/ufs: remove unused ufs_super_block_second pointer
  fs/ufs: remove unused ufs_super_block_first pointer
  fs/ufs/super.c: add __init to init_inodecache()
  doc/kernel-parameters.txt: add early_ioremap_debug
  arm64: add early_ioremap support
  arm64: initialize pgprot info earlier in boot
  x86: use generic early_ioremap
  mm: create generic early_ioremap() support
  x86/mm: sparse warning fix for early_memremap
  lglock: map to spinlock when !CONFIG_SMP
  percpu: add preemption checks to __this_cpu ops
  vmstat: use raw_cpu_ops to avoid false positives on preemption checks
  slub: use raw_cpu_inc for incrementing statistics
  net: replace __this_cpu_inc in route.c with raw_cpu_inc
  modules: use raw_cpu_write for initialization of per cpu refcount.
  mm: use raw_cpu ops for determining current NUMA node
  percpu: add raw_cpu_ops
  slub: fix leak of 'name' in sysfs_slab_add
  ...
hifive-unleashed-5.1
Linus Torvalds 2014-04-07 16:38:06 -07:00
parent dc5ed40686 fdc5813fbb
commit 26c12d9334
233 changed files with 3771 additions and 2069 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
Documentation/ABI/testing/sysfs-block-zram
View File

@ -43,6 +43,36 @@ Description:
The invalid_io file is read-only and specifies the number of
non-page-size-aligned I/O requests issued to this device.
What: /sys/block/zram<id>/failed_reads
Date: February 2014
Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Description:
The failed_reads file is read-only and specifies the number of
failed reads happened on this device.
What: /sys/block/zram<id>/failed_writes
Date: February 2014
Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Description:
The failed_writes file is read-only and specifies the number of
failed writes happened on this device.
What: /sys/block/zram<id>/max_comp_streams
Date: February 2014
Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Description:
The max_comp_streams file is read-write and specifies the
number of backend's zcomp_strm compression streams (number of
concurrent compress operations).
What: /sys/block/zram<id>/comp_algorithm
Date: February 2014
Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Description:
The comp_algorithm file is read-write and lets to show
available and selected compression algorithms, change
compression algorithm selection.
What: /sys/block/zram<id>/notify_free
Date: August 2010
Contact: Nitin Gupta <ngupta@vflare.org>
@ -53,15 +83,6 @@ Description:
is freed. This statistic is applicable only when this disk is
being used as a swap disk.
What: /sys/block/zram<id>/discard
Date: August 2010
Contact: Nitin Gupta <ngupta@vflare.org>
Description:
The discard file is read-only and specifies the number of
discard requests received by this device. These requests
provide information to block device regarding blocks which are
no longer used by filesystem.
What: /sys/block/zram<id>/zero_pages
Date: August 2010
Contact: Nitin Gupta <ngupta@vflare.org>

2
Documentation/DocBook/kernel-hacking.tmpl
View File

@ -671,7 +671,7 @@ printk(KERN_INFO "my ip: %pI4\n", &amp;ipaddress);
<sect1 id="routines-local-irqs">
<title><function>local_irq_save()</function>/<function>local_irq_restore()</function>
<filename class="headerfile">include/asm/system.h</filename>
<filename class="headerfile">include/linux/irqflags.h</filename>
</title>
<para>

4
Documentation/arm64/memory.txt
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@ -39,7 +39,7 @@ ffffffbffa000000 ffffffbffaffffff 16MB PCI I/O space
ffffffbffb000000 ffffffbffbbfffff 12MB [guard]
ffffffbffbc00000 ffffffbffbdfffff 2MB earlyprintk device
ffffffbffbc00000 ffffffbffbdfffff 2MB fixed mappings
ffffffbffbe00000 ffffffbffbffffff 2MB [guard]
@ -66,7 +66,7 @@ fffffdfffa000000 fffffdfffaffffff 16MB PCI I/O space
fffffdfffb000000 fffffdfffbbfffff 12MB [guard]
fffffdfffbc00000 fffffdfffbdfffff 2MB earlyprintk device
fffffdfffbc00000 fffffdfffbdfffff 2MB fixed mappings
fffffdfffbe00000 fffffdfffbffffff 2MB [guard]

54
Documentation/blockdev/zram.txt
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@ -21,7 +21,43 @@ Following shows a typical sequence of steps for using zram.
This creates 4 devices: /dev/zram{0,1,2,3}
(num_devices parameter is optional. Default: 1)
2) Set Disksize
2) Set max number of compression streams
Compression backend may use up to max_comp_streams compression streams,
thus allowing up to max_comp_streams concurrent compression operations.
By default, compression backend uses single compression stream.
Examples:
#show max compression streams number
cat /sys/block/zram0/max_comp_streams
#set max compression streams number to 3
echo 3 > /sys/block/zram0/max_comp_streams
Note:
In order to enable compression backend's multi stream support max_comp_streams
must be initially set to desired concurrency level before ZRAM device
initialisation. Once the device initialised as a single stream compression
backend (max_comp_streams equals to 1), you will see error if you try to change
the value of max_comp_streams because single stream compression backend
implemented as a special case by lock overhead issue and does not support
dynamic max_comp_streams. Only multi stream backend supports dynamic
max_comp_streams adjustment.
3) Select compression algorithm
Using comp_algorithm device attribute one can see available and
currently selected (shown in square brackets) compression algortithms,
change selected compression algorithm (once the device is initialised
there is no way to change compression algorithm).
Examples:
#show supported compression algorithms
cat /sys/block/zram0/comp_algorithm
lzo [lz4]
#select lzo compression algorithm
echo lzo > /sys/block/zram0/comp_algorithm
4) Set Disksize
Set disk size by writing the value to sysfs node 'disksize'.
The value can be either in bytes or you can use mem suffixes.
Examples:
@ -33,32 +69,38 @@ Following shows a typical sequence of steps for using zram.
echo 512M > /sys/block/zram0/disksize
echo 1G > /sys/block/zram0/disksize
3) Activate:
Note:
There is little point creating a zram of greater than twice the size of memory
since we expect a 2:1 compression ratio. Note that zram uses about 0.1% of the
size of the disk when not in use so a huge zram is wasteful.
5) Activate:
mkswap /dev/zram0
swapon /dev/zram0
mkfs.ext4 /dev/zram1
mount /dev/zram1 /tmp
4) Stats:
6) Stats:
Per-device statistics are exported as various nodes under
/sys/block/zram<id>/
disksize
num_reads
num_writes
failed_reads
failed_writes
invalid_io
notify_free
discard
zero_pages
orig_data_size
compr_data_size
mem_used_total
5) Deactivate:
7) Deactivate:
swapoff /dev/zram0
umount /dev/zram1
6) Reset:
8) Reset:
Write any positive value to 'reset' sysfs node
echo 1 > /sys/block/zram0/reset
echo 1 > /sys/block/zram1/reset

4
Documentation/cgroups/memcg_test.txt
View File

@ -24,7 +24,7 @@ Please note that implementation details can be changed.
a page/swp_entry may be charged (usage += PAGE_SIZE) at
mem_cgroup_newpage_charge()
mem_cgroup_charge_anon()
Called at new page fault and Copy-On-Write.
mem_cgroup_try_charge_swapin()
@ -32,7 +32,7 @@ Please note that implementation details can be changed.
Followed by charge-commit-cancel protocol. (With swap accounting)
At commit, a charge recorded in swap_cgroup is removed.
mem_cgroup_cache_charge()
mem_cgroup_charge_file()
Called at add_to_page_cache()
mem_cgroup_cache_charge_swapin()

12
Documentation/cgroups/resource_counter.txt
View File

@ -76,15 +76,7 @@ to work with it.
limit_fail_at parameter is set to the particular res_counter element
where the charging failed.
d. int res_counter_charge_locked
(struct res_counter *rc, unsigned long val, bool force)
The same as res_counter_charge(), but it must not acquire/release the
res_counter->lock internally (it must be called with res_counter->lock
held). The force parameter indicates whether we can bypass the limit.
e. u64 res_counter_uncharge[_locked]
(struct res_counter *rc, unsigned long val)
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
@ -93,7 +85,7 @@ to work with it.
The _locked routines imply that the res_counter->lock is taken.
f. u64 res_counter_uncharge_until
e. u64 res_counter_uncharge_until
(struct res_counter *rc, struct res_counter *top,
unsigned long val)

10
Documentation/filesystems/Locking
View File

@ -529,6 +529,7 @@ locking rules:
open: yes
close: yes
fault: yes can return with page locked
map_pages: yes
page_mkwrite: yes can return with page locked
access: yes
@ -540,6 +541,15 @@ the page, then ensure it is not already truncated (the page lock will block
subsequent truncate), and then return with VM_FAULT_LOCKED, and the page
locked. The VM will unlock the page.
->map_pages() is called when VM asks to map easy accessible pages.
Filesystem should find and map pages associated with offsets from "pgoff"
till "max_pgoff". ->map_pages() is called with page table locked and must
not block. If it's not possible to reach a page without blocking,
filesystem should skip it. Filesystem should use do_set_pte() to setup
page table entry. Pointer to entry associated with offset "pgoff" is
passed in "pte" field in vm_fault structure. Pointers to entries for other
offsets should be calculated relative to "pte".
->page_mkwrite() is called when a previously read-only pte is
about to become writeable. The filesystem again must ensure that there are
no truncate/invalidate races, and then return with the page locked. If

9
Documentation/filesystems/affs.txt
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@ -49,6 +49,10 @@ mode=mode Sets the mode flags to the given (octal) value, regardless
This is useful since most of the plain AmigaOS files
will map to 600.
nofilenametruncate
The file system will return an error when filename exceeds
standard maximum filename length (30 characters).
reserved=num Sets the number of reserved blocks at the start of the
partition to num. You should never need this option.
Default is 2.
@ -181,9 +185,8 @@ tested, though several hundred MB have been read and written using
this fs. For a most up-to-date list of bugs please consult
fs/affs/Changes.
Filenames are truncated to 30 characters without warning (this
can be changed by setting the compile-time option AFFS_NO_TRUNCATE
in include/linux/amigaffs.h).
By default, filenames are truncated to 30 characters without warning.
'nofilenametruncate' mount option can change that behavior.
Case is ignored by the affs in filename matching, but Linux shells
do care about the case. Example (with /wb being an affs mounted fs):

17
Documentation/filesystems/proc.txt
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@ -1648,18 +1648,21 @@ pids, so one need to either stop or freeze processes being inspected
if precise results are needed.
3.7 /proc/<pid>/fdinfo/<fd> - Information about opened file
3.8 /proc/<pid>/fdinfo/<fd> - Information about opened file
---------------------------------------------------------------
This file provides information associated with an opened file. The regular
files have at least two fields -- 'pos' and 'flags'. The 'pos' represents
the current offset of the opened file in decimal form [see lseek(2) for
details] and 'flags' denotes the octal O_xxx mask the file has been
created with [see open(2) for details].
files have at least three fields -- 'pos', 'flags' and mnt_id. The 'pos'
represents the current offset of the opened file in decimal form [see lseek(2)
for details], 'flags' denotes the octal O_xxx mask the file has been
created with [see open(2) for details] and 'mnt_id' represents mount ID of
the file system containing the opened file [see 3.5 /proc/<pid>/mountinfo
for details].
A typical output is
pos: 0
flags: 0100002
mnt_id: 19
The files such as eventfd, fsnotify, signalfd, epoll among the regular pos/flags
pair provide additional information particular to the objects they represent.
@ -1668,6 +1671,7 @@ pair provide additional information particular to the objects they represent.
~~~~~~~~~~~~~
pos: 0
flags: 04002
mnt_id: 9
eventfd-count: 5a
where 'eventfd-count' is hex value of a counter.
@ -1676,6 +1680,7 @@ pair provide additional information particular to the objects they represent.
~~~~~~~~~~~~~~
pos: 0
flags: 04002
mnt_id: 9
sigmask: 0000000000000200
where 'sigmask' is hex value of the signal mask associated
@ -1685,6 +1690,7 @@ pair provide additional information particular to the objects they represent.
~~~~~~~~~~~
pos: 0
flags: 02
mnt_id: 9
tfd: 5 events: 1d data: ffffffffffffffff
where 'tfd' is a target file descriptor number in decimal form,
@ -1718,6 +1724,7 @@ pair provide additional information particular to the objects they represent.
pos: 0
flags: 02
mnt_id: 9
fanotify flags:10 event-flags:0
fanotify mnt_id:12 mflags:40 mask:38 ignored_mask:40000003
fanotify ino:4f969 sdev:800013 mflags:0 mask:3b ignored_mask:40000000 fhandle-bytes:8 fhandle-type:1 f_handle:69f90400c275b5b4

7
Documentation/irqflags-tracing.txt
View File

@ -22,13 +22,6 @@ rather straightforward and risk-free manner.
Architectures that want to support this need to do a couple of
code-organizational changes first:
- move their irq-flags manipulation code from their asm/system.h header
to asm/irqflags.h
- rename local_irq_disable()/etc to raw_local_irq_disable()/etc. so that
the linux/irqflags.h code can inject callbacks and can construct the
real local_irq_disable()/etc APIs.
- add and enable TRACE_IRQFLAGS_SUPPORT in their arch level Kconfig file
and then a couple of functional changes are needed as well to implement

4
Documentation/kbuild/kconfig-language.txt
View File

@ -157,6 +157,10 @@ applicable everywhere (see syntax).
to the build environment (if this is desired, it can be done via
another symbol).
- "allnoconfig_y"
This declares the symbol as one that should have the value y when
using "allnoconfig". Used for symbols that hide other symbols.
Menu dependencies
-----------------

5
Documentation/kernel-parameters.txt
View File

@ -884,6 +884,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
Enable debug messages at boot time. See
Documentation/dynamic-debug-howto.txt for details.
early_ioremap_debug [KNL]
Enable debug messages in early_ioremap support. This
is useful for tracking down temporary early mappings
which are not unmapped.
earlycon= [KNL] Output early console device and options.
uart[8250],io,<addr>[,options]
uart[8250],mmio,<addr>[,options]

66
Documentation/rapidio/sysfs.txt
View File

@ -2,8 +2,8 @@
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. Device Subdirectories
------------------------
1. RapidIO Device Subdirectories
--------------------------------
For each RapidIO device, the RapidIO subsystem creates files in an individual
subdirectory with the following name, /sys/bus/rapidio/devices/<device_name>.
@ -25,8 +25,8 @@ seen by the enumerating host (destID = 1):
NOTE: An enumerating or discovering endpoint does not create a sysfs entry for
itself, this is why an endpoint with destID=1 is not shown in the list.
2. Attributes Common for All Devices
------------------------------------
2. Attributes Common for All RapidIO Devices
--------------------------------------------
Each device subdirectory contains the following informational read-only files:
@ -52,16 +52,16 @@ This attribute is similar in behavior to the "config" attribute of PCI devices
and provides an access to the RapidIO device registers using standard file read
and write operations.
3. Endpoint Device Attributes
-----------------------------
3. RapidIO Endpoint Device Attributes
-------------------------------------
Currently Linux RapidIO subsystem does not create any endpoint specific sysfs
attributes. It is possible that RapidIO master port drivers and endpoint device
drivers will add their device-specific sysfs attributes but such attributes are
outside the scope of this document.
4. Switch Device Attributes
---------------------------
4. RapidIO Switch Device Attributes
-----------------------------------
RapidIO switches have additional attributes in sysfs. RapidIO subsystem supports
common and device-specific sysfs attributes for switches. Because switches are
@ -106,3 +106,53 @@ attribute:
for that controller always will be 0.
To initiate RapidIO enumeration/discovery on all available mports
a user must write '-1' (or RIO_MPORT_ANY) into this attribute file.
6. RapidIO Bus Controllers/Ports
--------------------------------
On-chip RapidIO controllers and PCIe-to-RapidIO bridges (referenced as
"Master Port" or "mport") are presented in sysfs as the special class of
devices: "rapidio_port".
The /sys/class/rapidio_port subdirectory contains individual subdirectories
named as "rapidioN" where N = mport ID registered with RapidIO subsystem.
NOTE: An mport ID is not a RapidIO destination ID assigned to a given local
mport device.
Each mport device subdirectory in addition to standard entries contains the
following device-specific attributes:
port_destid - reports RapidIO destination ID assigned to the given RapidIO
mport device. If value 0xFFFFFFFF is returned this means that
no valid destination ID have been assigned to the mport (yet).
Normally, before enumeration/discovery have been executed only
fabric enumerating mports have a valid destination ID assigned
to them using "hdid=..." rapidio module parameter.
sys_size - reports RapidIO common transport system size:
0 = small (8-bit destination ID, max. 256 devices),
1 = large (16-bit destination ID, max. 65536 devices).
After enumeration or discovery was performed for a given mport device,
the corresponding subdirectory will also contain subdirectories for each
child RapidIO device connected to the mport. Naming conventions for RapidIO
devices are described in Section 1 above.
The example below shows mport device subdirectory with several child RapidIO
devices attached to it.
[rio@rapidio ~]$ ls /sys/class/rapidio_port/rapidio0/ -l
total 0
drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0001
drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0004
drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0007
drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0002
drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0003
drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0005
lrwxrwxrwx 1 root root 0 Feb 11 15:11 device -> ../../../0000:01:00.0
-r--r--r-- 1 root root 4096 Feb 11 15:11 port_destid
drwxr-xr-x 2 root root 0 Feb 11 15:11 power
lrwxrwxrwx 1 root root 0 Feb 11 15:04 subsystem -> ../../../../../../class/rapidio_port
-r--r--r-- 1 root root 4096 Feb 11 15:11 sys_size
-rw-r--r-- 1 root root 4096 Feb 11 15:04 uevent

2
Documentation/scheduler/sched-arch.txt
View File

@ -8,7 +8,7 @@ Context switch
By default, the switch_to arch function is called with the runqueue
locked. This is usually not a problem unless switch_to may need to
take the runqueue lock. This is usually due to a wake up operation in
the context switch. See arch/ia64/include/asm/system.h for an example.
the context switch. See arch/ia64/include/asm/switch_to.h for an example.
To request the scheduler call switch_to with the runqueue unlocked,
you must `#define __ARCH_WANT_UNLOCKED_CTXSW` in a header file

1
Documentation/sysctl/kernel.txt
View File

@ -317,6 +317,7 @@ for more than this value report a warning.
This file shows up if CONFIG_DETECT_HUNG_TASK is enabled.
0: means infinite timeout - no checking done.
Possible values to set are in range {0..LONG_MAX/HZ}.
==============================================================

3
MAINTAINERS
View File

@ -4542,8 +4542,7 @@ K: \b(ABS|SYN)_MT_
INTEL C600 SERIES SAS CONTROLLER DRIVER
M: Intel SCU Linux support <intel-linux-scu@intel.com>
M: Lukasz Dorau <lukasz.dorau@intel.com>
M: Maciej Patelczyk <maciej.patelczyk@intel.com>
M: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
M: Dave Jiang <dave.jiang@intel.com>
L: linux-scsi@vger.kernel.org
T: git git://git.code.sf.net/p/intel-sas/isci

2
arch/arc/Kconfig
View File

@ -57,7 +57,7 @@ config ARCH_FLATMEM_ENABLE
config MMU
def_bool y
config NO_IOPORT
config NO_IOPORT_MAP
def_bool y
config GENERIC_CALIBRATE_DELAY

12
arch/arm/Kconfig
View File

@ -126,7 +126,7 @@ config HAVE_TCM
config HAVE_PROC_CPU
bool
config NO_IOPORT
config NO_IOPORT_MAP
bool
config EISA
@ -410,7 +410,7 @@ config ARCH_EBSA110
select ISA
select NEED_MACH_IO_H
select NEED_MACH_MEMORY_H
select NO_IOPORT
select NO_IOPORT_MAP
help
This is an evaluation board for the StrongARM processor available
from Digital. It has limited hardware on-board, including an
@ -428,7 +428,7 @@ config ARCH_EFM32
select CPU_V7M
select GENERIC_CLOCKEVENTS
select NO_DMA
select NO_IOPORT
select NO_IOPORT_MAP
select SPARSE_IRQ
select USE_OF
help
@ -677,7 +677,7 @@ config ARCH_SHMOBILE_LEGACY
select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
select MULTI_IRQ_HANDLER
select NO_IOPORT
select NO_IOPORT_MAP
select PINCTRL
select PM_GENERIC_DOMAINS if PM
select SPARSE_IRQ
@ -699,7 +699,7 @@ config ARCH_RPC
select ISA_DMA_API
select NEED_MACH_IO_H
select NEED_MACH_MEMORY_H
select NO_IOPORT
select NO_IOPORT_MAP
select VIRT_TO_BUS
help
On the Acorn Risc-PC, Linux can support the internal IDE disk and
@ -760,7 +760,7 @@ config ARCH_S3C64XX
select HAVE_S3C2410_I2C if I2C
select HAVE_S3C2410_WATCHDOG if WATCHDOG
select HAVE_TCM
select NO_IOPORT
select NO_IOPORT_MAP
select PLAT_SAMSUNG
select PM_GENERIC_DOMAINS if PM
select S3C_DEV_NAND

2
arch/arm/mach-picoxcell/Kconfig
View File

@ -4,4 +4,4 @@ config ARCH_PICOXCELL
select ARM_VIC
select DW_APB_TIMER_OF
select HAVE_TCM
select NO_IOPORT
select NO_IOPORT_MAP

2
arch/arm/mach-prima2/Kconfig
View File

@ -3,7 +3,7 @@ config ARCH_SIRF
select ARCH_HAS_RESET_CONTROLLER
select ARCH_REQUIRE_GPIOLIB
select GENERIC_IRQ_CHIP
select NO_IOPORT
select NO_IOPORT_MAP
select PINCTRL
select PINCTRL_SIRF
help

2
arch/arm/mach-s3c24xx/Kconfig
View File

@ -12,7 +12,7 @@ if ARCH_S3C24XX
config PLAT_S3C24XX
def_bool y
select ARCH_REQUIRE_GPIOLIB
select NO_IOPORT
select NO_IOPORT_MAP
select S3C_DEV_NAND
select IRQ_DOMAIN
help

2
arch/arm/mach-shmobile/Kconfig
View File

@ -10,7 +10,7 @@ config ARCH_SHMOBILE_MULTI
select ARM_GIC
select MIGHT_HAVE_PCI
select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
select NO_IOPORT
select NO_IOPORT_MAP
select PINCTRL
select ARCH_REQUIRE_GPIOLIB

2
arch/arm/mach-vexpress/Kconfig
View File

@ -10,7 +10,7 @@ config ARCH_VEXPRESS
select HAVE_ARM_TWD if SMP
select HAVE_PATA_PLATFORM
select ICST
select NO_IOPORT
select NO_IOPORT_MAP
select PLAT_VERSATILE
select PLAT_VERSATILE_CLCD
select POWER_RESET

4
arch/arm/plat-samsung/Kconfig
View File

@ -9,7 +9,7 @@ config PLAT_SAMSUNG
depends on PLAT_S3C24XX || ARCH_S3C64XX || PLAT_S5P || ARCH_EXYNOS
default y
select GENERIC_IRQ_CHIP
select NO_IOPORT
select NO_IOPORT_MAP
help
Base platform code for all Samsung SoC based systems
@ -19,7 +19,7 @@ config PLAT_S5P
default y
select ARCH_REQUIRE_GPIOLIB
select ARM_VIC
select NO_IOPORT
select NO_IOPORT_MAP
select PLAT_SAMSUNG
select S3C_GPIO_TRACK
select S5P_GPIO_DRVSTR

3
arch/arm64/Kconfig
View File

@ -17,6 +17,7 @@ config ARM64
select GENERIC_CLOCKEVENTS
select GENERIC_CLOCKEVENTS_BROADCAST if SMP
select GENERIC_CPU_AUTOPROBE
select GENERIC_EARLY_IOREMAP
select GENERIC_IOMAP
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
@ -66,7 +67,7 @@ config ARCH_PHYS_ADDR_T_64BIT
config MMU
def_bool y
config NO_IOPORT
config NO_IOPORT_MAP
def_bool y
config STACKTRACE_SUPPORT

1
arch/arm64/include/asm/Kbuild
View File

@ -10,6 +10,7 @@ generic-y += delay.h
generic-y += div64.h
generic-y += dma.h
generic-y += emergency-restart.h
generic-y += early_ioremap.h
generic-y += errno.h
generic-y += ftrace.h
generic-y += hash.h

67
arch/arm64/include/asm/fixmap.h 100644
View File

@ -0,0 +1,67 @@
/*
* fixmap.h: compile-time virtual memory allocation
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1998 Ingo Molnar
* Copyright (C) 2013 Mark Salter <msalter@redhat.com>
*
* Adapted from arch/x86_64 version.
*
*/
#ifndef _ASM_ARM64_FIXMAP_H
#define _ASM_ARM64_FIXMAP_H
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
#include <asm/page.h>
/*
* Here we define all the compile-time 'special' virtual
* addresses. The point is to have a constant address at
* compile time, but to set the physical address only
* in the boot process.
*
* These 'compile-time allocated' memory buffers are
* page-sized. Use set_fixmap(idx,phys) to associate
* physical memory with fixmap indices.
*
*/
enum fixed_addresses {
FIX_EARLYCON_MEM_BASE,
__end_of_permanent_fixed_addresses,
/*
* Temporary boot-time mappings, used by early_ioremap(),
* before ioremap() is functional.
*/
#ifdef CONFIG_ARM64_64K_PAGES
#define NR_FIX_BTMAPS 4
#else
#define NR_FIX_BTMAPS 64
#endif
#define FIX_BTMAPS_SLOTS 7
#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
__end_of_fixed_addresses
};
#define FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
#define FIXMAP_PAGE_IO __pgprot(PROT_DEVICE_nGnRE)
extern void __early_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags);
#define __set_fixmap __early_set_fixmap
#include <asm-generic/fixmap.h>
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_ARM64_FIXMAP_H */

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

@ -27,6 +27,7 @@
#include <asm/byteorder.h>
#include <asm/barrier.h>
#include <asm/pgtable.h>
#include <asm/early_ioremap.h>
#include <xen/xen.h>

2
arch/arm64/include/asm/memory.h
View File

@ -49,7 +49,7 @@
#define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1))
#define MODULES_END (PAGE_OFFSET)
#define MODULES_VADDR (MODULES_END - SZ_64M)
#define EARLYCON_IOBASE (MODULES_VADDR - SZ_4M)
#define FIXADDR_TOP (MODULES_VADDR - SZ_2M - PAGE_SIZE)
#define TASK_SIZE_64 (UL(1) << VA_BITS)
#ifdef CONFIG_COMPAT

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

@ -27,5 +27,6 @@ typedef struct {
extern void paging_init(void);
extern void setup_mm_for_reboot(void);
extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
extern void init_mem_pgprot(void);
#endif

8
arch/arm64/kernel/early_printk.c
View File

@ -26,6 +26,8 @@
#include <linux/amba/serial.h>
#include <linux/serial_reg.h>
#include <asm/fixmap.h>
static void __iomem *early_base;
static void (*printch)(char ch);
@ -141,8 +143,10 @@ static int __init setup_early_printk(char *buf)
}
/* no options parsing yet */
if (paddr)
early_base = early_io_map(paddr, EARLYCON_IOBASE);
if (paddr) {
set_fixmap_io(FIX_EARLYCON_MEM_BASE, paddr);
early_base = (void __iomem *)fix_to_virt(FIX_EARLYCON_MEM_BASE);
}
printch = match->printch;
early_console = &early_console_dev;

9
arch/arm64/kernel/head.S
View File

@ -404,7 +404,7 @@ ENDPROC(__calc_phys_offset)
* - identity mapping to enable the MMU (low address, TTBR0)
* - first few MB of the kernel linear mapping to jump to once the MMU has
* been enabled, including the FDT blob (TTBR1)
* - UART mapping if CONFIG_EARLY_PRINTK is enabled (TTBR1)
* - pgd entry for fixed mappings (TTBR1)
*/
__create_page_tables:
pgtbl x25, x26, x24 // idmap_pg_dir and swapper_pg_dir addresses
@ -461,15 +461,12 @@ __create_page_tables:
sub x6, x6, #1 // inclusive range
create_block_map x0, x7, x3, x5, x6
1:
#ifdef CONFIG_EARLY_PRINTK
/*
* Create the pgd entry for the UART mapping. The full mapping is done
* later based earlyprintk kernel parameter.
* Create the pgd entry for the fixed mappings.
*/
ldr x5, =EARLYCON_IOBASE // UART virtual address
ldr x5, =FIXADDR_TOP // Fixed mapping virtual address
add x0, x26, #2 * PAGE_SIZE // section table address
create_pgd_entry x26, x0, x5, x6, x7
#endif
ret
ENDPROC(__create_page_tables)
.ltorg

4
arch/arm64/kernel/setup.c
View File

@ -42,6 +42,7 @@
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
#include <asm/fixmap.h>
#include <asm/cputype.h>
#include <asm/elf.h>
#include <asm/cputable.h>
@ -360,6 +361,9 @@ void __init setup_arch(char **cmdline_p)
*cmdline_p = boot_command_line;
init_mem_pgprot();
early_ioremap_init();
parse_early_param();
arm64_memblock_init();

85
arch/arm64/mm/ioremap.c
View File

@ -25,6 +25,10 @@
#include <linux/vmalloc.h>
#include <linux/io.h>
#include <asm/fixmap.h>
#include <asm/tlbflush.h>
#include <asm/pgalloc.h>
static void __iomem *__ioremap_caller(phys_addr_t phys_addr, size_t size,
pgprot_t prot, void *caller)
{
@ -98,3 +102,84 @@ void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size)
__builtin_return_address(0));
}
EXPORT_SYMBOL(ioremap_cache);
#ifndef CONFIG_ARM64_64K_PAGES
static pte_t bm_pte[PTRS_PER_PTE] __page_aligned_bss;
#endif
static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
{
pgd_t *pgd;
pud_t *pud;
pgd = pgd_offset_k(addr);
BUG_ON(pgd_none(*pgd) || pgd_bad(*pgd));
pud = pud_offset(pgd, addr);
BUG_ON(pud_none(*pud) || pud_bad(*pud));
return pmd_offset(pud, addr);
}
static inline pte_t * __init early_ioremap_pte(unsigned long addr)
{
pmd_t *pmd = early_ioremap_pmd(addr);
BUG_ON(pmd_none(*pmd) || pmd_bad(*pmd));
return pte_offset_kernel(pmd, addr);
}
void __init early_ioremap_init(void)
{
pmd_t *pmd;
pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
#ifndef CONFIG_ARM64_64K_PAGES
/* need to populate pmd for 4k pagesize only */
pmd_populate_kernel(&init_mm, pmd, bm_pte);
#endif
/*
* The boot-ioremap range spans multiple pmds, for which
* we are not prepared:
*/
BUILD_BUG_ON((__fix_to_virt(FIX_BTMAP_BEGIN) >> PMD_SHIFT)
!= (__fix_to_virt(FIX_BTMAP_END) >> PMD_SHIFT));
if (pmd != early_ioremap_pmd(fix_to_virt(FIX_BTMAP_END))) {
WARN_ON(1);
pr_warn("pmd %p != %p\n",
pmd, early_ioremap_pmd(fix_to_virt(FIX_BTMAP_END)));
pr_warn("fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
fix_to_virt(FIX_BTMAP_BEGIN));
pr_warn("fix_to_virt(FIX_BTMAP_END): %08lx\n",
fix_to_virt(FIX_BTMAP_END));
pr_warn("FIX_BTMAP_END: %d\n", FIX_BTMAP_END);
pr_warn("FIX_BTMAP_BEGIN: %d\n",
FIX_BTMAP_BEGIN);
}
early_ioremap_setup();
}
void __init __early_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags)
{
unsigned long addr = __fix_to_virt(idx);
pte_t *pte;
if (idx >= __end_of_fixed_addresses) {
BUG();
return;
}
pte = early_ioremap_pte(addr);
if (pgprot_val(flags))
set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));
else {
pte_clear(&init_mm, addr, pte);
flush_tlb_kernel_range(addr, addr+PAGE_SIZE);
}
}

44
arch/arm64/mm/mmu.c
View File

@ -125,7 +125,7 @@ early_param("cachepolicy", early_cachepolicy);
/*
* Adjust the PMD section entries according to the CPU in use.
*/
static void __init init_mem_pgprot(void)
void __init init_mem_pgprot(void)
{
pteval_t default_pgprot;
int i;
@ -260,47 +260,6 @@ static void __init create_mapping(phys_addr_t phys, unsigned long virt,
} while (pgd++, addr = next, addr != end);
}
#ifdef CONFIG_EARLY_PRINTK
/*
* Create an early I/O mapping using the pgd/pmd entries already populated
* in head.S as this function is called too early to allocated any memory. The
* mapping size is 2MB with 4KB pages or 64KB or 64KB pages.
*/
void __iomem * __init early_io_map(phys_addr_t phys, unsigned long virt)
{
unsigned long size, mask;
bool page64k = IS_ENABLED(CONFIG_ARM64_64K_PAGES);
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
/*
* No early pte entries with !ARM64_64K_PAGES configuration, so using
* sections (pmd).
*/
size = page64k ? PAGE_SIZE : SECTION_SIZE;
mask = ~(size - 1);
pgd = pgd_offset_k(virt);
pud = pud_offset(pgd, virt);
if (pud_none(*pud))
return NULL;
pmd = pmd_offset(pud, virt);
if (page64k) {
if (pmd_none(*pmd))
return NULL;
pte = pte_offset_kernel(pmd, virt);
set_pte(pte, __pte((phys & mask) | PROT_DEVICE_nGnRE));
} else {
set_pmd(pmd, __pmd((phys & mask) | PROT_SECT_DEVICE_nGnRE));
}
return (void __iomem *)((virt & mask) + (phys & ~mask));
}
#endif
static void __init map_mem(void)
{
struct memblock_region *reg;
@ -357,7 +316,6 @@ void __init paging_init(void)
{
void *zero_page;
init_mem_pgprot();
map_mem();
/*

3
arch/cris/Kconfig
View File

@ -29,7 +29,7 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
config NO_IOPORT
config NO_IOPORT_MAP
def_bool y
config FORCE_MAX_ZONEORDER
@ -138,6 +138,7 @@ config ETRAX_ARCH_V10
bool
default y if ETRAX100LX || ETRAX100LX_V2
default n if !(ETRAX100LX || ETRAX100LX_V2)
select TTY
config ETRAX_ARCH_V32
bool

2
arch/cris/kernel/setup.c
View File

@ -165,6 +165,7 @@ void __init setup_arch(char **cmdline_p)
strcpy(init_utsname()->machine, cris_machine_name);
}
#ifdef CONFIG_PROC_FS
static void *c_start(struct seq_file *m, loff_t *pos)
{
return *pos < nr_cpu_ids ? (void *)(int)(*pos + 1) : NULL;
@ -188,6 +189,7 @@ const struct seq_operations cpuinfo_op = {
.stop = c_stop,
.show = show_cpuinfo,
};
#endif /* CONFIG_PROC_FS */
static int __init topology_init(void)
{

2
arch/hexagon/Kconfig
View File

@ -19,7 +19,7 @@ config HEXAGON
select GENERIC_IRQ_SHOW
select HAVE_ARCH_KGDB
select HAVE_ARCH_TRACEHOOK
select NO_IOPORT
select NO_IOPORT_MAP
select GENERIC_IOMAP
select GENERIC_SMP_IDLE_THREAD
select STACKTRACE_SUPPORT

1
arch/ia64/Kconfig
View File

@ -21,6 +21,7 @@ config IA64
select HAVE_FUNCTION_TRACER
select HAVE_DMA_ATTRS
select HAVE_KVM
select TTY
select HAVE_ARCH_TRACEHOOK
select HAVE_DMA_API_DEBUG
select HAVE_MEMBLOCK

2
arch/m32r/Kconfig
View File

@ -28,7 +28,7 @@ config ZONE_DMA
bool
default y
config NO_IOPORT
config NO_IOPORT_MAP
def_bool y
config NO_DMA

2
arch/m68k/Kconfig
View File

@ -52,7 +52,7 @@ config TIME_LOW_RES
bool
default y
config NO_IOPORT
config NO_IOPORT_MAP
def_bool y
config NO_DMA

2
arch/metag/Kconfig
View File

@ -52,7 +52,7 @@ config GENERIC_HWEIGHT
config GENERIC_CALIBRATE_DELAY
def_bool y
config NO_IOPORT
config NO_IOPORT_MAP
def_bool y
source "init/Kconfig"

4
arch/mips/Kconfig
View File

@ -175,7 +175,7 @@ config MACH_DECSTATION
select CPU_R4000_WORKAROUNDS if 64BIT
select CPU_R4400_WORKAROUNDS if 64BIT
select DMA_NONCOHERENT
select NO_IOPORT
select NO_IOPORT_MAP
select IRQ_CPU
select SYS_HAS_CPU_R3000
select SYS_HAS_CPU_R4X00
@ -947,7 +947,7 @@ config SYNC_R4K
config MIPS_MACHINE
def_bool n
config NO_IOPORT
config NO_IOPORT_MAP
def_bool n
config GENERIC_ISA_DMA

2
arch/openrisc/Kconfig
View File

@ -41,7 +41,7 @@ config RWSEM_XCHGADD_ALGORITHM
config GENERIC_HWEIGHT
def_bool y
config NO_IOPORT
config NO_IOPORT_MAP
def_bool y
config TRACE_IRQFLAGS_SUPPORT

1
arch/powerpc/include/asm/fadump.h
View File

@ -210,7 +210,6 @@ extern int is_fadump_active(void);
extern void crash_fadump(struct pt_regs *, const char *);
extern void fadump_cleanup(void);
extern void vmcore_cleanup(void);
#else /* CONFIG_FA_DUMP */
static inline int is_fadump_active(void) { return 0; }
static inline void crash_fadump(struct pt_regs *regs, const char *str) { }

1
arch/powerpc/platforms/Kconfig.cputype
View File

@ -73,6 +73,7 @@ config PPC_BOOK3S_64
select SYS_SUPPORTS_HUGETLBFS
select HAVE_ARCH_TRANSPARENT_HUGEPAGE if PPC_64K_PAGES
select ARCH_SUPPORTS_NUMA_BALANCING
select IRQ_WORK
config PPC_BOOK3E_64
bool "Embedded processors"

1
arch/powerpc/sysdev/fsl_rio.c
View File

@ -531,6 +531,7 @@ int fsl_rio_setup(struct platform_device *dev)
sprintf(port->name, "RIO mport %d", i);
priv->dev = &dev->dev;
port->dev.parent = &dev->dev;
port->ops = ops;
port->priv = priv;
port->phys_efptr = 0x100;

2
arch/s390/Kconfig
View File

@ -52,7 +52,7 @@ config KEXEC
config AUDIT_ARCH
def_bool y
config NO_IOPORT
config NO_IOPORT_MAP
def_bool y
config PCI_QUIRKS

3
arch/s390/mm/pgtable.c
View File

@ -505,6 +505,9 @@ static int gmap_connect_pgtable(unsigned long address, unsigned long segment,
if (!pmd_present(*pmd) &&
__pte_alloc(mm, vma, pmd, vmaddr))
return -ENOMEM;
/* large pmds cannot yet be handled */
if (pmd_large(*pmd))
return -EFAULT;
/* pmd now points to a valid segment table entry. */
rmap = kmalloc(sizeof(*rmap), GFP_KERNEL|__GFP_REPEAT);
if (!rmap)

4
arch/sh/Kconfig
View File

@ -3,7 +3,7 @@ config SUPERH
select ARCH_MIGHT_HAVE_PC_PARPORT
select EXPERT
select CLKDEV_LOOKUP
select HAVE_IDE if HAS_IOPORT
select HAVE_IDE if HAS_IOPORT_MAP
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select ARCH_DISCARD_MEMBLOCK
@ -138,7 +138,7 @@ config ARCH_HAS_ILOG2_U32
config ARCH_HAS_ILOG2_U64
def_bool n
config NO_IOPORT
config NO_IOPORT_MAP
def_bool !PCI
depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
!SH_HP6XX && !SH_SOLUTION_ENGINE

8
arch/sh/boards/Kconfig
View File

@ -158,7 +158,7 @@ config SH_SDK7786
bool "SDK7786"
depends on CPU_SUBTYPE_SH7786
select SYS_SUPPORTS_PCI
select NO_IOPORT if !PCI
select NO_IOPORT_MAP if !PCI
select ARCH_WANT_OPTIONAL_GPIOLIB
select HAVE_SRAM_POOL
select REGULATOR_FIXED_VOLTAGE if REGULATOR
@ -204,7 +204,7 @@ config SH_URQUELL
depends on CPU_SUBTYPE_SH7786
select ARCH_REQUIRE_GPIOLIB
select SYS_SUPPORTS_PCI
select NO_IOPORT if !PCI
select NO_IOPORT_MAP if !PCI
config SH_MIGOR
bool "Migo-R"
@ -306,7 +306,7 @@ config SH_LBOX_RE2
config SH_X3PROTO
bool "SH-X3 Prototype board"
depends on CPU_SUBTYPE_SHX3
select NO_IOPORT if !PCI
select NO_IOPORT_MAP if !PCI
select IRQ_DOMAIN
config SH_MAGIC_PANEL_R2
@ -333,7 +333,7 @@ config SH_POLARIS
config SH_SH2007
bool "SH-2007 board"
select NO_IOPORT
select NO_IOPORT_MAP
select REGULATOR_FIXED_VOLTAGE if REGULATOR
depends on CPU_SUBTYPE_SH7780
help

4
arch/sh/include/asm/io.h
View File

@ -122,7 +122,7 @@ __BUILD_MEMORY_STRING(__raw_, l, u32)
__BUILD_MEMORY_STRING(__raw_, q, u64)
#ifdef CONFIG_HAS_IOPORT
#ifdef CONFIG_HAS_IOPORT_MAP
/*
* Slowdown I/O port space accesses for antique hardware.
@ -218,7 +218,7 @@ __BUILD_IOPORT_STRING(w, u16)
__BUILD_IOPORT_STRING(l, u32)
__BUILD_IOPORT_STRING(q, u64)
#else /* !CONFIG_HAS_IOPORT */
#else /* !CONFIG_HAS_IOPORT_MAP */
#include <asm/io_noioport.h>

2
arch/sh/include/asm/io_trapped.h
View File

@ -36,7 +36,7 @@ __ioremap_trapped(unsigned long offset, unsigned long size)
#define __ioremap_trapped(offset, size) NULL
#endif
#ifdef CONFIG_HAS_IOPORT
#ifdef CONFIG_HAS_IOPORT_MAP
extern struct list_head trapped_io;
static inline void __iomem *

2
arch/sh/include/asm/machvec.h
View File

@ -21,7 +21,7 @@ struct sh_machine_vector {
int (*mv_irq_demux)(int irq);
void (*mv_init_irq)(void);
#ifdef CONFIG_HAS_IOPORT
#ifdef CONFIG_HAS_IOPORT_MAP
void __iomem *(*mv_ioport_map)(unsigned long port, unsigned int size);
void (*mv_ioport_unmap)(void __iomem *);
#endif

2
arch/sh/kernel/Makefile
View File

@ -22,7 +22,7 @@ obj-y := debugtraps.o dma-nommu.o dumpstack.o \
ifndef CONFIG_GENERIC_IOMAP
obj-y += iomap.o
obj-$(CONFIG_HAS_IOPORT) += ioport.o
obj-$(CONFIG_HAS_IOPORT_MAP) += ioport.o
endif
obj-$(CONFIG_SUPERH32) += sys_sh32.o

4
arch/sh/kernel/io_trapped.c
View File

@ -22,7 +22,7 @@
#define TRAPPED_PAGES_MAX 16
#ifdef CONFIG_HAS_IOPORT
#ifdef CONFIG_HAS_IOPORT_MAP
LIST_HEAD(trapped_io);
EXPORT_SYMBOL_GPL(trapped_io);
#endif
@ -90,7 +90,7 @@ int register_trapped_io(struct trapped_io *tiop)
tiop->magic = IO_TRAPPED_MAGIC;
INIT_LIST_HEAD(&tiop->list);
spin_lock_irq(&trapped_lock);
#ifdef CONFIG_HAS_IOPORT
#ifdef CONFIG_HAS_IOPORT_MAP
if (flags & IORESOURCE_IO)
list_add(&tiop->list, &trapped_io);
#endif

2
arch/tile/Kconfig
View File

@ -411,7 +411,7 @@ config PCI_DOMAINS
config NO_IOMEM
def_bool !PCI
config NO_IOPORT
config NO_IOPORT_MAP
def_bool !PCI
config TILE_PCI_IO

2
arch/um/kernel/process.c
View File

@ -359,7 +359,7 @@ int singlestepping(void * t)
/*
* Only x86 and x86_64 have an arch_align_stack().
* All other arches have "#define arch_align_stack(x) (x)"
* in their asm/system.h
* in their asm/exec.h
* As this is included in UML from asm-um/system-generic.h,
* we can use it to behave as the subarch does.
*/

2
arch/unicore32/Kconfig
View File

@ -27,7 +27,7 @@ config UNICORE32
config GENERIC_CSUM
def_bool y
config NO_IOPORT
config NO_IOPORT_MAP
bool
config STACKTRACE_SUPPORT

4
arch/unicore32/include/asm/mmu_context.h
View File

@ -14,6 +14,8 @@
#include <linux/compiler.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/vmacache.h>
#include <linux/io.h>
#include <asm/cacheflush.h>
@ -73,7 +75,7 @@ do { \
else \
mm->mmap = NULL; \
rb_erase(&high_vma->vm_rb, &mm->mm_rb); \
mm->mmap_cache = NULL; \
vmacache_invalidate(mm); \
mm->map_count--; \
remove_vma(high_vma); \
} \

1
arch/x86/Kconfig
View File

@ -43,6 +43,7 @@ config X86
select HAVE_DMA_ATTRS
select HAVE_DMA_CONTIGUOUS if !SWIOTLB
select HAVE_KRETPROBES
select GENERIC_EARLY_IOREMAP
select HAVE_OPTPROBES
select HAVE_KPROBES_ON_FTRACE
select HAVE_FTRACE_MCOUNT_RECORD

1
arch/x86/include/asm/Kbuild
View File

@ -5,5 +5,6 @@ genhdr-y += unistd_64.h
genhdr-y += unistd_x32.h
generic-y += clkdev.h
generic-y += early_ioremap.h
generic-y += cputime.h
generic-y += mcs_spinlock.h

3
arch/x86/include/asm/bug.h
View File

@ -1,7 +1,6 @@
#ifndef _ASM_X86_BUG_H
#define _ASM_X86_BUG_H
#ifdef CONFIG_BUG
#define HAVE_ARCH_BUG
#ifdef CONFIG_DEBUG_BUGVERBOSE
@ -33,8 +32,6 @@ do { \
} while (0)
#endif
#endif /* !CONFIG_BUG */
#include <asm-generic/bug.h>
#endif /* _ASM_X86_BUG_H */

6
arch/x86/include/asm/fixmap.h
View File

@ -163,5 +163,11 @@ static inline void __set_fixmap(enum fixed_addresses idx,
#include <asm-generic/fixmap.h>
#define __late_set_fixmap(idx, phys, flags) __set_fixmap(idx, phys, flags)
#define __late_clear_fixmap(idx) __set_fixmap(idx, 0, __pgprot(0))
void __early_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_FIXMAP_H */

14
arch/x86/include/asm/io.h
View File

@ -39,6 +39,7 @@
#include <linux/string.h>
#include <linux/compiler.h>
#include <asm/page.h>
#include <asm/early_ioremap.h>
#define build_mmio_read(name, size, type, reg, barrier) \
static inline type name(const volatile void __iomem *addr) \
@ -316,19 +317,6 @@ extern int ioremap_change_attr(unsigned long vaddr, unsigned long size,
unsigned long prot_val);
extern void __iomem *ioremap_wc(resource_size_t offset, unsigned long size);
/*
* early_ioremap() and early_iounmap() are for temporary early boot-time
* mappings, before the real ioremap() is functional.
* A boot-time mapping is currently limited to at most 16 pages.
*/
extern void early_ioremap_init(void);
extern void early_ioremap_reset(void);
extern void __iomem *early_ioremap(resource_size_t phys_addr,
unsigned long size);
extern void __iomem *early_memremap(resource_size_t phys_addr,
unsigned long size);
extern void early_iounmap(void __iomem *addr, unsigned long size);
extern void fixup_early_ioremap(void);
extern bool is_early_ioremap_ptep(pte_t *ptep);
#ifdef CONFIG_XEN

94
arch/x86/include/asm/percpu.h
View File

@ -52,7 +52,7 @@
* Compared to the generic __my_cpu_offset version, the following
* saves one instruction and avoids clobbering a temp register.
*/
#define __this_cpu_ptr(ptr) \
#define raw_cpu_ptr(ptr) \
({ \
unsigned long tcp_ptr__; \
__verify_pcpu_ptr(ptr); \
@ -362,25 +362,25 @@ do { \
*/
#define this_cpu_read_stable(var) percpu_from_op("mov", var, "p" (&(var)))
#define __this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_read_4(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define raw_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define raw_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define raw_cpu_read_4(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_or_1(pcp, val) percpu_to_op("or", (pcp), val)
#define __this_cpu_or_2(pcp, val) percpu_to_op("or", (pcp), val)
#define __this_cpu_or_4(pcp, val) percpu_to_op("or", (pcp), val)
#define __this_cpu_xchg_1(pcp, val) percpu_xchg_op(pcp, val)
#define __this_cpu_xchg_2(pcp, val) percpu_xchg_op(pcp, val)
#define __this_cpu_xchg_4(pcp, val) percpu_xchg_op(pcp, val)
#define raw_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
#define raw_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
#define raw_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
#define raw_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
#define raw_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
#define raw_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define raw_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define raw_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define raw_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
#define raw_cpu_or_1(pcp, val) percpu_to_op("or", (pcp), val)
#define raw_cpu_or_2(pcp, val) percpu_to_op("or", (pcp), val)
#define raw_cpu_or_4(pcp, val) percpu_to_op("or", (pcp), val)
#define raw_cpu_xchg_1(pcp, val) percpu_xchg_op(pcp, val)
#define raw_cpu_xchg_2(pcp, val) percpu_xchg_op(pcp, val)
#define raw_cpu_xchg_4(pcp, val) percpu_xchg_op(pcp, val)
#define this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
@ -401,16 +401,16 @@ do { \
#define this_cpu_xchg_2(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_xchg_4(pcp, nval) percpu_xchg_op(pcp, nval)
#define __this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
#define __this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
#define __this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
#define __this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define __this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define __this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define raw_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
#define raw_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
#define raw_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
#define raw_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define raw_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define raw_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
@ -427,7 +427,7 @@ do { \
__ret; \
})
#define __this_cpu_cmpxchg_double_4 percpu_cmpxchg8b_double
#define raw_cpu_cmpxchg_double_4 percpu_cmpxchg8b_double
#define this_cpu_cmpxchg_double_4 percpu_cmpxchg8b_double
#endif /* CONFIG_X86_CMPXCHG64 */
@ -436,22 +436,22 @@ do { \
* 32 bit must fall back to generic operations.
*/
#ifdef CONFIG_X86_64
#define __this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define __this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
#define __this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
#define __this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define raw_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define raw_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
#define raw_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define raw_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define raw_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define raw_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
#define raw_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
#define raw_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
/*
@ -474,7 +474,7 @@ do { \
__ret; \
})
#define __this_cpu_cmpxchg_double_8 percpu_cmpxchg16b_double
#define raw_cpu_cmpxchg_double_8 percpu_cmpxchg16b_double
#define this_cpu_cmpxchg_double_8 percpu_cmpxchg16b_double
#endif
@ -495,9 +495,9 @@ static __always_inline int x86_this_cpu_constant_test_bit(unsigned int nr,
unsigned long __percpu *a = (unsigned long *)addr + nr / BITS_PER_LONG;
#ifdef CONFIG_X86_64
return ((1UL << (nr % BITS_PER_LONG)) & __this_cpu_read_8(*a)) != 0;
return ((1UL << (nr % BITS_PER_LONG)) & raw_cpu_read_8(*a)) != 0;
#else
return ((1UL << (nr % BITS_PER_LONG)) & __this_cpu_read_4(*a)) != 0;
return ((1UL << (nr % BITS_PER_LONG)) & raw_cpu_read_4(*a)) != 0;
#endif
}

16
arch/x86/include/asm/preempt.h
View File

@ -19,12 +19,12 @@ DECLARE_PER_CPU(int, __preempt_count);
*/
static __always_inline int preempt_count(void)
{
return __this_cpu_read_4(__preempt_count) & ~PREEMPT_NEED_RESCHED;
return raw_cpu_read_4(__preempt_count) & ~PREEMPT_NEED_RESCHED;
}
static __always_inline void preempt_count_set(int pc)
{
__this_cpu_write_4(__preempt_count, pc);
raw_cpu_write_4(__preempt_count, pc);
}
/*
@ -53,17 +53,17 @@ static __always_inline void preempt_count_set(int pc)
static __always_inline void set_preempt_need_resched(void)
{
__this_cpu_and_4(__preempt_count, ~PREEMPT_NEED_RESCHED);
raw_cpu_and_4(__preempt_count, ~PREEMPT_NEED_RESCHED);
}
static __always_inline void clear_preempt_need_resched(void)
{
__this_cpu_or_4(__preempt_count, PREEMPT_NEED_RESCHED);
raw_cpu_or_4(__preempt_count, PREEMPT_NEED_RESCHED);
}
static __always_inline bool test_preempt_need_resched(void)
{
return !(__this_cpu_read_4(__preempt_count) & PREEMPT_NEED_RESCHED);
return !(raw_cpu_read_4(__preempt_count) & PREEMPT_NEED_RESCHED);
}
/*
@ -72,12 +72,12 @@ static __always_inline bool test_preempt_need_resched(void)
static __always_inline void __preempt_count_add(int val)
{
__this_cpu_add_4(__preempt_count, val);
raw_cpu_add_4(__preempt_count, val);
}
static __always_inline void __preempt_count_sub(int val)
{
__this_cpu_add_4(__preempt_count, -val);
raw_cpu_add_4(__preempt_count, -val);
}
/*
@ -95,7 +95,7 @@ static __always_inline bool __preempt_count_dec_and_test(void)
*/
static __always_inline bool should_resched(void)
{
return unlikely(!__this_cpu_read_4(__preempt_count));
return unlikely(!raw_cpu_read_4(__preempt_count));
}
#ifdef CONFIG_PREEMPT

224
arch/x86/mm/ioremap.c
View File

@ -328,17 +328,6 @@ void unxlate_dev_mem_ptr(unsigned long phys, void *addr)
return;
}
static int __initdata early_ioremap_debug;
static int __init early_ioremap_debug_setup(char *str)
{
early_ioremap_debug = 1;
return 0;
}
early_param("early_ioremap_debug", early_ioremap_debug_setup);
static __initdata int after_paging_init;
static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] __page_aligned_bss;
static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
@ -362,18 +351,11 @@ bool __init is_early_ioremap_ptep(pte_t *ptep)
return ptep >= &bm_pte[0] && ptep < &bm_pte[PAGE_SIZE/sizeof(pte_t)];
}
static unsigned long slot_virt[FIX_BTMAPS_SLOTS] __initdata;
void __init early_ioremap_init(void)
{
pmd_t *pmd;
int i;
if (early_ioremap_debug)
printk(KERN_INFO "early_ioremap_init()\n");
for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
slot_virt[i] = __fix_to_virt(FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*i);
early_ioremap_setup();
pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
memset(bm_pte, 0, sizeof(bm_pte));
@ -402,13 +384,8 @@ void __init early_ioremap_init(void)
}
}
void __init early_ioremap_reset(void)
{
after_paging_init = 1;
}
static void __init __early_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags)
void __init __early_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags)
{
unsigned long addr = __fix_to_virt(idx);
pte_t *pte;
@ -425,198 +402,3 @@ static void __init __early_set_fixmap(enum fixed_addresses idx,
pte_clear(&init_mm, addr, pte);
__flush_tlb_one(addr);
}
static inline void __init early_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t prot)
{
if (after_paging_init)
__set_fixmap(idx, phys, prot);
else
__early_set_fixmap(idx, phys, prot);
}
static inline void __init early_clear_fixmap(enum fixed_addresses idx)
{
if (after_paging_init)
clear_fixmap(idx);
else
__early_set_fixmap(idx, 0, __pgprot(0));
}
static void __iomem *prev_map[FIX_BTMAPS_SLOTS] __initdata;
static unsigned long prev_size[FIX_BTMAPS_SLOTS] __initdata;
void __init fixup_early_ioremap(void)
{
int i;
for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
if (prev_map[i]) {
WARN_ON(1);
break;
}
}
early_ioremap_init();
}
static int __init check_early_ioremap_leak(void)
{
int count = 0;
int i;
for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
if (prev_map[i])
count++;
if (!count)
return 0;
WARN(1, KERN_WARNING
"Debug warning: early ioremap leak of %d areas detected.\n",
count);
printk(KERN_WARNING
"please boot with early_ioremap_debug and report the dmesg.\n");
return 1;
}
late_initcall(check_early_ioremap_leak);
static void __init __iomem *
__early_ioremap(resource_size_t phys_addr, unsigned long size, pgprot_t prot)
{
unsigned long offset;
resource_size_t last_addr;
unsigned int nrpages;
enum fixed_addresses idx;
int i, slot;
WARN_ON(system_state != SYSTEM_BOOTING);
slot = -1;
for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
if (!prev_map[i]) {
slot = i;
break;
}
}
if (slot < 0) {
printk(KERN_INFO "%s(%08llx, %08lx) not found slot\n",
__func__, (u64)phys_addr, size);
WARN_ON(1);
return NULL;
}
if (early_ioremap_debug) {
printk(KERN_INFO "%s(%08llx, %08lx) [%d] => ",
__func__, (u64)phys_addr, size, slot);
dump_stack();
}
/* Don't allow wraparound or zero size */
last_addr = phys_addr + size - 1;
if (!size || last_addr < phys_addr) {
WARN_ON(1);
return NULL;
}
prev_size[slot] = size;
/*
* Mappings have to be page-aligned
*/
offset = phys_addr & ~PAGE_MASK;
phys_addr &= PAGE_MASK;
size = PAGE_ALIGN(last_addr + 1) - phys_addr;
/*
* Mappings have to fit in the FIX_BTMAP area.
*/
nrpages = size >> PAGE_SHIFT;
if (nrpages > NR_FIX_BTMAPS) {
WARN_ON(1);
return NULL;
}
/*
* Ok, go for it..
*/
idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
while (nrpages > 0) {
early_set_fixmap(idx, phys_addr, prot);
phys_addr += PAGE_SIZE;
--idx;
--nrpages;
}
if (early_ioremap_debug)
printk(KERN_CONT "%08lx + %08lx\n", offset, slot_virt[slot]);
prev_map[slot] = (void __iomem *)(offset + slot_virt[slot]);
return prev_map[slot];
}
/* Remap an IO device */
void __init __iomem *
early_ioremap(resource_size_t phys_addr, unsigned long size)
{
return __early_ioremap(phys_addr, size, PAGE_KERNEL_IO);
}
/* Remap memory */
void __init __iomem *
early_memremap(resource_size_t phys_addr, unsigned long size)
{
return __early_ioremap(phys_addr, size, PAGE_KERNEL);
}
void __init early_iounmap(void __iomem *addr, unsigned long size)
{
unsigned long virt_addr;
unsigned long offset;
unsigned int nrpages;
enum fixed_addresses idx;
int i, slot;
slot = -1;
for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
if (prev_map[i] == addr) {
slot = i;
break;
}
}
if (slot < 0) {
printk(KERN_INFO "early_iounmap(%p, %08lx) not found slot\n",
addr, size);
WARN_ON(1);
return;
}
if (prev_size[slot] != size) {
printk(KERN_INFO "early_iounmap(%p, %08lx) [%d] size not consistent %08lx\n",
addr, size, slot, prev_size[slot]);
WARN_ON(1);
return;
}
if (early_ioremap_debug) {
printk(KERN_INFO "early_iounmap(%p, %08lx) [%d]\n", addr,
size, slot);
dump_stack();
}
virt_addr = (unsigned long)addr;
if (virt_addr < fix_to_virt(FIX_BTMAP_BEGIN)) {
WARN_ON(1);
return;
}
offset = virt_addr & ~PAGE_MASK;
nrpages = PAGE_ALIGN(offset + size) >> PAGE_SHIFT;
idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
while (nrpages > 0) {
early_clear_fixmap(idx);
--idx;
--nrpages;
}
prev_map[slot] = NULL;
}

2
arch/x86/mm/pgtable_32.c
View File

@ -127,7 +127,7 @@ static int __init parse_reservetop(char *arg)
address = memparse(arg, &arg);
reserve_top_address(address);
fixup_early_ioremap();
early_ioremap_init();
return 0;
}
early_param("reservetop", parse_reservetop);

4
arch/xtensa/Kconfig
View File

@ -41,7 +41,7 @@ config ARCH_HAS_ILOG2_U32
config ARCH_HAS_ILOG2_U64
def_bool n
config NO_IOPORT
config NO_IOPORT_MAP
def_bool n
config HZ
@ -239,7 +239,7 @@ config XTENSA_PLATFORM_XT2000
config XTENSA_PLATFORM_S6105
bool "S6105"
select SERIAL_CONSOLE
select NO_IOPORT
select NO_IOPORT_MAP
config XTENSA_PLATFORM_XTFPGA
bool "XTFPGA"

2
arch/xtensa/configs/iss_defconfig
View File

@ -11,7 +11,7 @@ CONFIG_GENERIC_FIND_NEXT_BIT=y
CONFIG_GENERIC_HWEIGHT=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_NO_IOPORT=y
CONFIG_NO_IOPORT_MAP=y
CONFIG_HZ=100
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_CONSTRUCTORS=y

2
arch/xtensa/configs/s6105_defconfig
View File

@ -11,7 +11,7 @@ CONFIG_GENERIC_FIND_NEXT_BIT=y
CONFIG_GENERIC_HWEIGHT=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_NO_IOPORT=y
CONFIG_NO_IOPORT_MAP=y
CONFIG_HZ=100
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

10
drivers/block/zram/Kconfig
View File

@ -15,6 +15,16 @@ config ZRAM
See zram.txt for more information.
config ZRAM_LZ4_COMPRESS
bool "Enable LZ4 algorithm support"
depends on ZRAM
select LZ4_COMPRESS
select LZ4_DECOMPRESS
default n
help
This option enables LZ4 compression algorithm support. Compression
algorithm can be changed using `comp_algorithm' device attribute.
config ZRAM_DEBUG
bool "Compressed RAM block device debug support"
depends on ZRAM

4
drivers/block/zram/Makefile
View File

@ -1,3 +1,5 @@
zram-y := zram_drv.o
zram-y := zcomp_lzo.o zcomp.o zram_drv.o
zram-$(CONFIG_ZRAM_LZ4_COMPRESS) += zcomp_lz4.o
obj-$(CONFIG_ZRAM) += zram.o

353
drivers/block/zram/zcomp.c 100644
View File

@ -0,0 +1,353 @@
/*
* Copyright (C) 2014 Sergey Senozhatsky.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include "zcomp.h"
#include "zcomp_lzo.h"
#ifdef CONFIG_ZRAM_LZ4_COMPRESS
#include "zcomp_lz4.h"
#endif
/*
* single zcomp_strm backend
*/
struct zcomp_strm_single {
struct mutex strm_lock;
struct zcomp_strm *zstrm;
};
/*
* multi zcomp_strm backend
*/
struct zcomp_strm_multi {
/* protect strm list */
spinlock_t strm_lock;
/* max possible number of zstrm streams */
int max_strm;
/* number of available zstrm streams */
int avail_strm;
/* list of available strms */
struct list_head idle_strm;
wait_queue_head_t strm_wait;
};
static struct zcomp_backend *backends[] = {
&zcomp_lzo,
#ifdef CONFIG_ZRAM_LZ4_COMPRESS
&zcomp_lz4,
#endif
NULL
};
static struct zcomp_backend *find_backend(const char *compress)
{
int i = 0;
while (backends[i]) {
if (sysfs_streq(compress, backends[i]->name))
break;
i++;
}
return backends[i];
}
static void zcomp_strm_free(struct zcomp *comp, struct zcomp_strm *zstrm)
{
if (zstrm->private)
comp->backend->destroy(zstrm->private);
free_pages((unsigned long)zstrm->buffer, 1);
kfree(zstrm);
}
/*
* allocate new zcomp_strm structure with ->private initialized by
* backend, return NULL on error
*/
static struct zcomp_strm *zcomp_strm_alloc(struct zcomp *comp)
{
struct zcomp_strm *zstrm = kmalloc(sizeof(*zstrm), GFP_KERNEL);
if (!zstrm)
return NULL;
zstrm->private = comp->backend->create();
/*
* allocate 2 pages. 1 for compressed data, plus 1 extra for the
* case when compressed size is larger than the original one
*/
zstrm->buffer = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
if (!zstrm->private || !zstrm->buffer) {
zcomp_strm_free(comp, zstrm);
zstrm = NULL;
}
return zstrm;
}
/*
* get idle zcomp_strm or wait until other process release
* (zcomp_strm_release()) one for us
*/
static struct zcomp_strm *zcomp_strm_multi_find(struct zcomp *comp)
{
struct zcomp_strm_multi *zs = comp->stream;
struct zcomp_strm *zstrm;
while (1) {
spin_lock(&zs->strm_lock);
if (!list_empty(&zs->idle_strm)) {
zstrm = list_entry(zs->idle_strm.next,
struct zcomp_strm, list);
list_del(&zstrm->list);
spin_unlock(&zs->strm_lock);
return zstrm;
}
/* zstrm streams limit reached, wait for idle stream */
if (zs->avail_strm >= zs->max_strm) {
spin_unlock(&zs->strm_lock);
wait_event(zs->strm_wait, !list_empty(&zs->idle_strm));
continue;
}
/* allocate new zstrm stream */
zs->avail_strm++;
spin_unlock(&zs->strm_lock);
zstrm = zcomp_strm_alloc(comp);
if (!zstrm) {
spin_lock(&zs->strm_lock);
zs->avail_strm--;
spin_unlock(&zs->strm_lock);
wait_event(zs->strm_wait, !list_empty(&zs->idle_strm));
continue;
}
break;
}
return zstrm;
}
/* add stream back to idle list and wake up waiter or free the stream */
static void zcomp_strm_multi_release(struct zcomp *comp, struct zcomp_strm *zstrm)
{
struct zcomp_strm_multi *zs = comp->stream;
spin_lock(&zs->strm_lock);
if (zs->avail_strm <= zs->max_strm) {
list_add(&zstrm->list, &zs->idle_strm);
spin_unlock(&zs->strm_lock);
wake_up(&zs->strm_wait);
return;
}
zs->avail_strm--;
spin_unlock(&zs->strm_lock);
zcomp_strm_free(comp, zstrm);
}
/* change max_strm limit */
static bool zcomp_strm_multi_set_max_streams(struct zcomp *comp, int num_strm)
{
struct zcomp_strm_multi *zs = comp->stream;
struct zcomp_strm *zstrm;
spin_lock(&zs->strm_lock);
zs->max_strm = num_strm;
/*
* if user has lowered the limit and there are idle streams,
* immediately free as much streams (and memory) as we can.
*/
while (zs->avail_strm > num_strm && !list_empty(&zs->idle_strm)) {
zstrm = list_entry(zs->idle_strm.next,
struct zcomp_strm, list);
list_del(&zstrm->list);
zcomp_strm_free(comp, zstrm);
zs->avail_strm--;
}
spin_unlock(&zs->strm_lock);
return true;
}
static void zcomp_strm_multi_destroy(struct zcomp *comp)
{
struct zcomp_strm_multi *zs = comp->stream;
struct zcomp_strm *zstrm;
while (!list_empty(&zs->idle_strm)) {
zstrm = list_entry(zs->idle_strm.next,
struct zcomp_strm, list);
list_del(&zstrm->list);
zcomp_strm_free(comp, zstrm);
}
kfree(zs);
}
static int zcomp_strm_multi_create(struct zcomp *comp, int max_strm)
{
struct zcomp_strm *zstrm;
struct zcomp_strm_multi *zs;
comp->destroy = zcomp_strm_multi_destroy;
comp->strm_find = zcomp_strm_multi_find;
comp->strm_release = zcomp_strm_multi_release;
comp->set_max_streams = zcomp_strm_multi_set_max_streams;
zs = kmalloc(sizeof(struct zcomp_strm_multi), GFP_KERNEL);
if (!zs)
return -ENOMEM;
comp->stream = zs;
spin_lock_init(&zs->strm_lock);
INIT_LIST_HEAD(&zs->idle_strm);
init_waitqueue_head(&zs->strm_wait);
zs->max_strm = max_strm;
zs->avail_strm = 1;
zstrm = zcomp_strm_alloc(comp);
if (!zstrm) {
kfree(zs);
return -ENOMEM;
}
list_add(&zstrm->list, &zs->idle_strm);
return 0;
}
static struct zcomp_strm *zcomp_strm_single_find(struct zcomp *comp)
{
struct zcomp_strm_single *zs = comp->stream;
mutex_lock(&zs->strm_lock);
return zs->zstrm;
}
static void zcomp_strm_single_release(struct zcomp *comp,
struct zcomp_strm *zstrm)
{
struct zcomp_strm_single *zs = comp->stream;
mutex_unlock(&zs->strm_lock);
}
static bool zcomp_strm_single_set_max_streams(struct zcomp *comp, int num_strm)
{
/* zcomp_strm_single support only max_comp_streams == 1 */
return false;
}
static void zcomp_strm_single_destroy(struct zcomp *comp)
{
struct zcomp_strm_single *zs = comp->stream;
zcomp_strm_free(comp, zs->zstrm);
kfree(zs);
}
static int zcomp_strm_single_create(struct zcomp *comp)
{
struct zcomp_strm_single *zs;
comp->destroy = zcomp_strm_single_destroy;
comp->strm_find = zcomp_strm_single_find;
comp->strm_release = zcomp_strm_single_release;
comp->set_max_streams = zcomp_strm_single_set_max_streams;
zs = kmalloc(sizeof(struct zcomp_strm_single), GFP_KERNEL);
if (!zs)
return -ENOMEM;
comp->stream = zs;
mutex_init(&zs->strm_lock);
zs->zstrm = zcomp_strm_alloc(comp);
if (!zs->zstrm) {
kfree(zs);
return -ENOMEM;
}
return 0;
}
/* show available compressors */
ssize_t zcomp_available_show(const char *comp, char *buf)
{
ssize_t sz = 0;
int i = 0;
while (backends[i]) {
if (sysfs_streq(comp, backends[i]->name))
sz += scnprintf(buf + sz, PAGE_SIZE - sz - 2,
"[%s] ", backends[i]->name);
else
sz += scnprintf(buf + sz, PAGE_SIZE - sz - 2,
"%s ", backends[i]->name);
i++;
}
sz += scnprintf(buf + sz, PAGE_SIZE - sz, "\n");
return sz;
}
bool zcomp_set_max_streams(struct zcomp *comp, int num_strm)
{
return comp->set_max_streams(comp, num_strm);
}
struct zcomp_strm *zcomp_strm_find(struct zcomp *comp)
{
return comp->strm_find(comp);
}
void zcomp_strm_release(struct zcomp *comp, struct zcomp_strm *zstrm)
{
comp->strm_release(comp, zstrm);
}
int zcomp_compress(struct zcomp *comp, struct zcomp_strm *zstrm,
const unsigned char *src, size_t *dst_len)
{
return comp->backend->compress(src, zstrm->buffer, dst_len,
zstrm->private);
}
int zcomp_decompress(struct zcomp *comp, const unsigned char *src,
size_t src_len, unsigned char *dst)
{
return comp->backend->decompress(src, src_len, dst);
}
void zcomp_destroy(struct zcomp *comp)
{
comp->destroy(comp);
kfree(comp);
}
/*
* search available compressors for requested algorithm.
* allocate new zcomp and initialize it. return compressing
* backend pointer or ERR_PTR if things went bad. ERR_PTR(-EINVAL)
* if requested algorithm is not supported, ERR_PTR(-ENOMEM) in
* case of allocation error.
*/
struct zcomp *zcomp_create(const char *compress, int max_strm)
{
struct zcomp *comp;
struct zcomp_backend *backend;
backend = find_backend(compress);
if (!backend)
return ERR_PTR(-EINVAL);
comp = kzalloc(sizeof(struct zcomp), GFP_KERNEL);
if (!comp)
return ERR_PTR(-ENOMEM);
comp->backend = backend;
if (max_strm > 1)
zcomp_strm_multi_create(comp, max_strm);
else
zcomp_strm_single_create(comp);
if (!comp->stream) {
kfree(comp);
return ERR_PTR(-ENOMEM);
}
return comp;
}

68
drivers/block/zram/zcomp.h 100644
View File

@ -0,0 +1,68 @@
/*
* Copyright (C) 2014 Sergey Senozhatsky.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ZCOMP_H_
#define _ZCOMP_H_
#include <linux/mutex.h>
struct zcomp_strm {
/* compression/decompression buffer */
void *buffer;
/*
* The private data of the compression stream, only compression
* stream backend can touch this (e.g. compression algorithm
* working memory)
*/
void *private;
/* used in multi stream backend, protected by backend strm_lock */
struct list_head list;
};
/* static compression backend */
struct zcomp_backend {
int (*compress)(const unsigned char *src, unsigned char *dst,
size_t *dst_len, void *private);
int (*decompress)(const unsigned char *src, size_t src_len,
unsigned char *dst);
void *(*create)(void);
void (*destroy)(void *private);
const char *name;
};
/* dynamic per-device compression frontend */
struct zcomp {
void *stream;
struct zcomp_backend *backend;
struct zcomp_strm *(*strm_find)(struct zcomp *comp);
void (*strm_release)(struct zcomp *comp, struct zcomp_strm *zstrm);
bool (*set_max_streams)(struct zcomp *comp, int num_strm);
void (*destroy)(struct zcomp *comp);
};
ssize_t zcomp_available_show(const char *comp, char *buf);
struct zcomp *zcomp_create(const char *comp, int max_strm);
void zcomp_destroy(struct zcomp *comp);
struct zcomp_strm *zcomp_strm_find(struct zcomp *comp);
void zcomp_strm_release(struct zcomp *comp, struct zcomp_strm *zstrm);
int zcomp_compress(struct zcomp *comp, struct zcomp_strm *zstrm,
const unsigned char *src, size_t *dst_len);
int zcomp_decompress(struct zcomp *comp, const unsigned char *src,
size_t src_len, unsigned char *dst);
bool zcomp_set_max_streams(struct zcomp *comp, int num_strm);
#endif /* _ZCOMP_H_ */

47
drivers/block/zram/zcomp_lz4.c 100644
View File

@ -0,0 +1,47 @@
/*
* Copyright (C) 2014 Sergey Senozhatsky.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/lz4.h>
#include "zcomp_lz4.h"
static void *zcomp_lz4_create(void)
{
return kzalloc(LZ4_MEM_COMPRESS, GFP_KERNEL);
}
static void zcomp_lz4_destroy(void *private)
{
kfree(private);
}
static int zcomp_lz4_compress(const unsigned char *src, unsigned char *dst,
size_t *dst_len, void *private)
{
/* return : Success if return 0 */
return lz4_compress(src, PAGE_SIZE, dst, dst_len, private);
}
static int zcomp_lz4_decompress(const unsigned char *src, size_t src_len,
unsigned char *dst)
{
size_t dst_len = PAGE_SIZE;
/* return : Success if return 0 */
return lz4_decompress_unknownoutputsize(src, src_len, dst, &dst_len);
}
struct zcomp_backend zcomp_lz4 = {
.compress = zcomp_lz4_compress,
.decompress = zcomp_lz4_decompress,
.create = zcomp_lz4_create,
.destroy = zcomp_lz4_destroy,
.name = "lz4",
};

17
drivers/block/zram/zcomp_lz4.h 100644
View File

@ -0,0 +1,17 @@
/*
* Copyright (C) 2014 Sergey Senozhatsky.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ZCOMP_LZ4_H_
#define _ZCOMP_LZ4_H_
#include "zcomp.h"
extern struct zcomp_backend zcomp_lz4;
#endif /* _ZCOMP_LZ4_H_ */

47
drivers/block/zram/zcomp_lzo.c 100644
View File

@ -0,0 +1,47 @@
/*
* Copyright (C) 2014 Sergey Senozhatsky.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/lzo.h>
#include "zcomp_lzo.h"
static void *lzo_create(void)
{
return kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
}
static void lzo_destroy(void *private)
{
kfree(private);
}
static int lzo_compress(const unsigned char *src, unsigned char *dst,
size_t *dst_len, void *private)
{
int ret = lzo1x_1_compress(src, PAGE_SIZE, dst, dst_len, private);
return ret == LZO_E_OK ? 0 : ret;
}
static int lzo_decompress(const unsigned char *src, size_t src_len,
unsigned char *dst)
{
size_t dst_len = PAGE_SIZE;
int ret = lzo1x_decompress_safe(src, src_len, dst, &dst_len);
return ret == LZO_E_OK ? 0 : ret;
}
struct zcomp_backend zcomp_lzo = {
.compress = lzo_compress,
.decompress = lzo_decompress,
.create = lzo_create,
.destroy = lzo_destroy,
.name = "lzo",
};

17
drivers/block/zram/zcomp_lzo.h 100644
View File

@ -0,0 +1,17 @@
/*
* Copyright (C) 2014 Sergey Senozhatsky.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ZCOMP_LZO_H_
#define _ZCOMP_LZO_H_
#include "zcomp.h"
extern struct zcomp_backend zcomp_lzo;
#endif /* _ZCOMP_LZO_H_ */

417
drivers/block/zram/zram_drv.c
View File

@ -29,19 +29,36 @@
#include <linux/genhd.h>
#include <linux/highmem.h>
#include <linux/slab.h>
#include <linux/lzo.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <linux/err.h>
#include "zram_drv.h"
/* Globals */
static int zram_major;
static struct zram *zram_devices;
static const char *default_compressor = "lzo";
/* Module params (documentation at end) */
static unsigned int num_devices = 1;
#define ZRAM_ATTR_RO(name) \
static ssize_t zram_attr_##name##_show(struct device *d, \
struct device_attribute *attr, char *b) \
{ \
struct zram *zram = dev_to_zram(d); \
return scnprintf(b, PAGE_SIZE, "%llu\n", \
(u64)atomic64_read(&zram->stats.name)); \
} \
static struct device_attribute dev_attr_##name = \
__ATTR(name, S_IRUGO, zram_attr_##name##_show, NULL);
static inline int init_done(struct zram *zram)
{
return zram->meta != NULL;
}
static inline struct zram *dev_to_zram(struct device *dev)
{
return (struct zram *)dev_to_disk(dev)->private_data;
@ -52,59 +69,20 @@ static ssize_t disksize_show(struct device *dev,
{
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%llu\n", zram->disksize);
return scnprintf(buf, PAGE_SIZE, "%llu\n", zram->disksize);
}
static ssize_t initstate_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u32 val;
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%u\n", zram->init_done);
}
down_read(&zram->init_lock);
val = init_done(zram);
up_read(&zram->init_lock);
static ssize_t num_reads_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%llu\n",
(u64)atomic64_read(&zram->stats.num_reads));
}
static ssize_t num_writes_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%llu\n",
(u64)atomic64_read(&zram->stats.num_writes));
}
static ssize_t invalid_io_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%llu\n",
(u64)atomic64_read(&zram->stats.invalid_io));
}
static ssize_t notify_free_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%llu\n",
(u64)atomic64_read(&zram->stats.notify_free));
}
static ssize_t zero_pages_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%u\n", atomic_read(&zram->stats.pages_zero));
return scnprintf(buf, PAGE_SIZE, "%u\n", val);
}
static ssize_t orig_data_size_show(struct device *dev,
@ -112,17 +90,8 @@ static ssize_t orig_data_size_show(struct device *dev,
{
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%llu\n",
(u64)(atomic_read(&zram->stats.pages_stored)) << PAGE_SHIFT);
}
static ssize_t compr_data_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct zram *zram = dev_to_zram(dev);
return sprintf(buf, "%llu\n",
(u64)atomic64_read(&zram->stats.compr_size));
return scnprintf(buf, PAGE_SIZE, "%llu\n",
(u64)(atomic64_read(&zram->stats.pages_stored)) << PAGE_SHIFT);
}
static ssize_t mem_used_total_show(struct device *dev,
@ -133,11 +102,81 @@ static ssize_t mem_used_total_show(struct device *dev,
struct zram_meta *meta = zram->meta;
down_read(&zram->init_lock);
if (zram->init_done)
if (init_done(zram))
val = zs_get_total_size_bytes(meta->mem_pool);
up_read(&zram->init_lock);
return sprintf(buf, "%llu\n", val);
return scnprintf(buf, PAGE_SIZE, "%llu\n", val);
}
static ssize_t max_comp_streams_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int val;
struct zram *zram = dev_to_zram(dev);
down_read(&zram->init_lock);
val = zram->max_comp_streams;
up_read(&zram->init_lock);
return scnprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t max_comp_streams_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
int num;
struct zram *zram = dev_to_zram(dev);
int ret;
ret = kstrtoint(buf, 0, &num);
if (ret < 0)
return ret;
if (num < 1)
return -EINVAL;
down_write(&zram->init_lock);
if (init_done(zram)) {
if (!zcomp_set_max_streams(zram->comp, num)) {
pr_info("Cannot change max compression streams\n");
ret = -EINVAL;
goto out;
}
}
zram->max_comp_streams = num;
ret = len;
out:
up_write(&zram->init_lock);
return ret;
}
static ssize_t comp_algorithm_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
size_t sz;
struct zram *zram = dev_to_zram(dev);
down_read(&zram->init_lock);
sz = zcomp_available_show(zram->compressor, buf);
up_read(&zram->init_lock);
return sz;
}
static ssize_t comp_algorithm_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct zram *zram = dev_to_zram(dev);
down_write(&zram->init_lock);
if (init_done(zram)) {
up_write(&zram->init_lock);
pr_info("Can't change algorithm for initialized device\n");
return -EBUSY;
}
strlcpy(zram->compressor, buf, sizeof(zram->compressor));
up_write(&zram->init_lock);
return len;
}
/* flag operations needs meta->tb_lock */
@ -192,8 +231,6 @@ static inline int valid_io_request(struct zram *zram, struct bio *bio)
static void zram_meta_free(struct zram_meta *meta)
{
zs_destroy_pool(meta->mem_pool);
kfree(meta->compress_workmem);
free_pages((unsigned long)meta->compress_buffer, 1);
vfree(meta->table);
kfree(meta);
}
@ -205,22 +242,11 @@ static struct zram_meta *zram_meta_alloc(u64 disksize)
if (!meta)
goto out;
meta->compress_workmem = kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
if (!meta->compress_workmem)
goto free_meta;
meta->compress_buffer =
(void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
if (!meta->compress_buffer) {
pr_err("Error allocating compressor buffer space\n");
goto free_workmem;
}
num_pages = disksize >> PAGE_SHIFT;
meta->table = vzalloc(num_pages * sizeof(*meta->table));
if (!meta->table) {
pr_err("Error allocating zram address table\n");
goto free_buffer;
goto free_meta;
}
meta->mem_pool = zs_create_pool(GFP_NOIO | __GFP_HIGHMEM);
@ -230,15 +256,10 @@ static struct zram_meta *zram_meta_alloc(u64 disksize)
}
rwlock_init(&meta->tb_lock);
mutex_init(&meta->buffer_lock);
return meta;
free_table:
vfree(meta->table);
free_buffer:
free_pages((unsigned long)meta->compress_buffer, 1);
free_workmem:
kfree(meta->compress_workmem);
free_meta:
kfree(meta);
meta = NULL;
@ -288,7 +309,6 @@ static void zram_free_page(struct zram *zram, size_t index)
{
struct zram_meta *meta = zram->meta;
unsigned long handle = meta->table[index].handle;
u16 size = meta->table[index].size;
if (unlikely(!handle)) {
/*
@ -297,21 +317,15 @@ static void zram_free_page(struct zram *zram, size_t index)
*/
if (zram_test_flag(meta, index, ZRAM_ZERO)) {
zram_clear_flag(meta, index, ZRAM_ZERO);
atomic_dec(&zram->stats.pages_zero);
atomic64_dec(&zram->stats.zero_pages);
}
return;
}
if (unlikely(size > max_zpage_size))
atomic_dec(&zram->stats.bad_compress);
zs_free(meta->mem_pool, handle);
if (size <= PAGE_SIZE / 2)
atomic_dec(&zram->stats.good_compress);
atomic64_sub(meta->table[index].size, &zram->stats.compr_size);
atomic_dec(&zram->stats.pages_stored);
atomic64_sub(meta->table[index].size, &zram->stats.compr_data_size);
atomic64_dec(&zram->stats.pages_stored);
meta->table[index].handle = 0;
meta->table[index].size = 0;
@ -319,8 +333,7 @@ static void zram_free_page(struct zram *zram, size_t index)
static int zram_decompress_page(struct zram *zram, char *mem, u32 index)
{
int ret = LZO_E_OK;
size_t clen = PAGE_SIZE;
int ret = 0;
unsigned char *cmem;
struct zram_meta *meta = zram->meta;
unsigned long handle;
@ -340,12 +353,12 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index)
if (size == PAGE_SIZE)
copy_page(mem, cmem);
else
ret = lzo1x_decompress_safe(cmem, size, mem, &clen);
ret = zcomp_decompress(zram->comp, cmem, size, mem);
zs_unmap_object(meta->mem_pool, handle);
read_unlock(&meta->tb_lock);
/* Should NEVER happen. Return bio error if it does. */
if (unlikely(ret != LZO_E_OK)) {
if (unlikely(ret)) {
pr_err("Decompression failed! err=%d, page=%u\n", ret, index);
atomic64_inc(&zram->stats.failed_reads);
return ret;
@ -388,7 +401,7 @@ static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,
ret = zram_decompress_page(zram, uncmem, index);
/* Should NEVER happen. Return bio error if it does. */
if (unlikely(ret != LZO_E_OK))
if (unlikely(ret))
goto out_cleanup;
if (is_partial_io(bvec))
@ -413,11 +426,10 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
struct page *page;
unsigned char *user_mem, *cmem, *src, *uncmem = NULL;
struct zram_meta *meta = zram->meta;
struct zcomp_strm *zstrm;
bool locked = false;
page = bvec->bv_page;
src = meta->compress_buffer;
if (is_partial_io(bvec)) {
/*
* This is a partial IO. We need to read the full page
@ -433,7 +445,7 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
goto out;
}
mutex_lock(&meta->buffer_lock);
zstrm = zcomp_strm_find(zram->comp);
locked = true;
user_mem = kmap_atomic(page);
@ -454,28 +466,25 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
zram_set_flag(meta, index, ZRAM_ZERO);
write_unlock(&zram->meta->tb_lock);
atomic_inc(&zram->stats.pages_zero);
atomic64_inc(&zram->stats.zero_pages);
ret = 0;
goto out;
}
ret = lzo1x_1_compress(uncmem, PAGE_SIZE, src, &clen,
meta->compress_workmem);
ret = zcomp_compress(zram->comp, zstrm, uncmem, &clen);
if (!is_partial_io(bvec)) {
kunmap_atomic(user_mem);
user_mem = NULL;
uncmem = NULL;
}
if (unlikely(ret != LZO_E_OK)) {
if (unlikely(ret)) {
pr_err("Compression failed! err=%d\n", ret);
goto out;
}
src = zstrm->buffer;
if (unlikely(clen > max_zpage_size)) {
atomic_inc(&zram->stats.bad_compress);
clen = PAGE_SIZE;
src = NULL;
if (is_partial_io(bvec))
src = uncmem;
}
@ -497,6 +506,8 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
memcpy(cmem, src, clen);
}
zcomp_strm_release(zram->comp, zstrm);
locked = false;
zs_unmap_object(meta->mem_pool, handle);
/*
@ -511,49 +522,88 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
write_unlock(&zram->meta->tb_lock);
/* Update stats */
atomic64_add(clen, &zram->stats.compr_size);
atomic_inc(&zram->stats.pages_stored);
if (clen <= PAGE_SIZE / 2)
atomic_inc(&zram->stats.good_compress);
atomic64_add(clen, &zram->stats.compr_data_size);
atomic64_inc(&zram->stats.pages_stored);
out:
if (locked)
mutex_unlock(&meta->buffer_lock);
zcomp_strm_release(zram->comp, zstrm);
if (is_partial_io(bvec))
kfree(uncmem);
if (ret)
atomic64_inc(&zram->stats.failed_writes);
return ret;
}
static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
int offset, struct bio *bio, int rw)
int offset, struct bio *bio)
{
int ret;
int rw = bio_data_dir(bio);
if (rw == READ)
if (rw == READ) {
atomic64_inc(&zram->stats.num_reads);
ret = zram_bvec_read(zram, bvec, index, offset, bio);
else
} else {
atomic64_inc(&zram->stats.num_writes);
ret = zram_bvec_write(zram, bvec, index, offset);
}
return ret;
}
/*
* zram_bio_discard - handler on discard request
* @index: physical block index in PAGE_SIZE units
* @offset: byte offset within physical block
*/
static void zram_bio_discard(struct zram *zram, u32 index,
int offset, struct bio *bio)
{
size_t n = bio->bi_iter.bi_size;
/*
* zram manages data in physical block size units. Because logical block
* size isn't identical with physical block size on some arch, we
* could get a discard request pointing to a specific offset within a
* certain physical block. Although we can handle this request by
* reading that physiclal block and decompressing and partially zeroing
* and re-compressing and then re-storing it, this isn't reasonable
* because our intent with a discard request is to save memory. So
* skipping this logical block is appropriate here.
*/
if (offset) {
if (n < offset)
return;
n -= offset;
index++;
}
while (n >= PAGE_SIZE) {
/*
* Discard request can be large so the lock hold times could be
* lengthy. So take the lock once per page.
*/
write_lock(&zram->meta->tb_lock);
zram_free_page(zram, index);
write_unlock(&zram->meta->tb_lock);
index++;
n -= PAGE_SIZE;
}
}
static void zram_reset_device(struct zram *zram, bool reset_capacity)
{
size_t index;
struct zram_meta *meta;
down_write(&zram->init_lock);
if (!zram->init_done) {
if (!init_done(zram)) {
up_write(&zram->init_lock);
return;
}
meta = zram->meta;
zram->init_done = 0;
/* Free all pages that are still in this zram device */
for (index = 0; index < zram->disksize >> PAGE_SHIFT; index++) {
unsigned long handle = meta->table[index].handle;
@ -563,6 +613,9 @@ static void zram_reset_device(struct zram *zram, bool reset_capacity)
zs_free(meta->mem_pool, handle);
}
zcomp_destroy(zram->comp);
zram->max_comp_streams = 1;
zram_meta_free(zram->meta);
zram->meta = NULL;
/* Reset stats */
@ -574,37 +627,14 @@ static void zram_reset_device(struct zram *zram, bool reset_capacity)
up_write(&zram->init_lock);
}
static void zram_init_device(struct zram *zram, struct zram_meta *meta)
{
if (zram->disksize > 2 * (totalram_pages << PAGE_SHIFT)) {
pr_info(
"There is little point creating a zram of greater than "
"twice the size of memory since we expect a 2:1 compression "
"ratio. Note that zram uses about 0.1%% of the size of "
"the disk when not in use so a huge zram is "
"wasteful.\n"
"\tMemory Size: %lu kB\n"
"\tSize you selected: %llu kB\n"
"Continuing anyway ...\n",
(totalram_pages << PAGE_SHIFT) >> 10, zram->disksize >> 10
);
}
/* zram devices sort of resembles non-rotational disks */
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, zram->disk->queue);
zram->meta = meta;
zram->init_done = 1;
pr_debug("Initialization done!\n");
}
static ssize_t disksize_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
u64 disksize;
struct zcomp *comp;
struct zram_meta *meta;
struct zram *zram = dev_to_zram(dev);
int err;
disksize = memparse(buf, NULL);
if (!disksize)
@ -614,20 +644,35 @@ static ssize_t disksize_store(struct device *dev,
meta = zram_meta_alloc(disksize);
if (!meta)
return -ENOMEM;
down_write(&zram->init_lock);
if (zram->init_done) {
up_write(&zram->init_lock);
zram_meta_free(meta);
pr_info("Cannot change disksize for initialized device\n");
return -EBUSY;
comp = zcomp_create(zram->compressor, zram->max_comp_streams);
if (IS_ERR(comp)) {
pr_info("Cannot initialise %s compressing backend\n",
zram->compressor);
err = PTR_ERR(comp);
goto out_free_meta;
}
down_write(&zram->init_lock);
if (init_done(zram)) {
pr_info("Cannot change disksize for initialized device\n");
err = -EBUSY;
goto out_destroy_comp;
}
zram->meta = meta;
zram->comp = comp;
zram->disksize = disksize;
set_capacity(zram->disk, zram->disksize >> SECTOR_SHIFT);
zram_init_device(zram, meta);
up_write(&zram->init_lock);
return len;
out_destroy_comp:
up_write(&zram->init_lock);
zcomp_destroy(comp);
out_free_meta:
zram_meta_free(meta);
return err;
}
static ssize_t reset_store(struct device *dev,
@ -671,26 +716,23 @@ out:
return ret;
}
static void __zram_make_request(struct zram *zram, struct bio *bio, int rw)
static void __zram_make_request(struct zram *zram, struct bio *bio)
{
int offset;
u32 index;
struct bio_vec bvec;
struct bvec_iter iter;
switch (rw) {
case READ:
atomic64_inc(&zram->stats.num_reads);
break;
case WRITE:
atomic64_inc(&zram->stats.num_writes);
break;
}
index = bio->bi_iter.bi_sector >> SECTORS_PER_PAGE_SHIFT;
offset = (bio->bi_iter.bi_sector &
(SECTORS_PER_PAGE - 1)) << SECTOR_SHIFT;
if (unlikely(bio->bi_rw & REQ_DISCARD)) {
zram_bio_discard(zram, index, offset, bio);
bio_endio(bio, 0);
return;
}
bio_for_each_segment(bvec, bio, iter) {
int max_transfer_size = PAGE_SIZE - offset;
@ -705,16 +747,15 @@ static void __zram_make_request(struct zram *zram, struct bio *bio, int rw)
bv.bv_len = max_transfer_size;
bv.bv_offset = bvec.bv_offset;
if (zram_bvec_rw(zram, &bv, index, offset, bio, rw) < 0)
if (zram_bvec_rw(zram, &bv, index, offset, bio) < 0)
goto out;
bv.bv_len = bvec.bv_len - max_transfer_size;
bv.bv_offset += max_transfer_size;
if (zram_bvec_rw(zram, &bv, index+1, 0, bio, rw) < 0)
if (zram_bvec_rw(zram, &bv, index + 1, 0, bio) < 0)
goto out;
} else
if (zram_bvec_rw(zram, &bvec, index, offset, bio, rw)
< 0)
if (zram_bvec_rw(zram, &bvec, index, offset, bio) < 0)
goto out;
update_position(&index, &offset, &bvec);
@ -736,7 +777,7 @@ static void zram_make_request(struct request_queue *queue, struct bio *bio)
struct zram *zram = queue->queuedata;
down_read(&zram->init_lock);
if (unlikely(!zram->init_done))
if (unlikely(!init_done(zram)))
goto error;
if (!valid_io_request(zram, bio)) {
@ -744,7 +785,7 @@ static void zram_make_request(struct request_queue *queue, struct bio *bio)
goto error;
}
__zram_make_request(zram, bio, bio_data_dir(bio));
__zram_make_request(zram, bio);
up_read(&zram->init_lock);
return;
@ -778,14 +819,21 @@ static DEVICE_ATTR(disksize, S_IRUGO | S_IWUSR,
disksize_show, disksize_store);
static DEVICE_ATTR(initstate, S_IRUGO, initstate_show, NULL);
static DEVICE_ATTR(reset, S_IWUSR, NULL, reset_store);
static DEVICE_ATTR(num_reads, S_IRUGO, num_reads_show, NULL);
static DEVICE_ATTR(num_writes, S_IRUGO, num_writes_show, NULL);
static DEVICE_ATTR(invalid_io, S_IRUGO, invalid_io_show, NULL);
static DEVICE_ATTR(notify_free, S_IRUGO, notify_free_show, NULL);
static DEVICE_ATTR(zero_pages, S_IRUGO, zero_pages_show, NULL);
static DEVICE_ATTR(orig_data_size, S_IRUGO, orig_data_size_show, NULL);
static DEVICE_ATTR(compr_data_size, S_IRUGO, compr_data_size_show, NULL);
static DEVICE_ATTR(mem_used_total, S_IRUGO, mem_used_total_show, NULL);
static DEVICE_ATTR(max_comp_streams, S_IRUGO | S_IWUSR,
max_comp_streams_show, max_comp_streams_store);
static DEVICE_ATTR(comp_algorithm, S_IRUGO | S_IWUSR,
comp_algorithm_show, comp_algorithm_store);
ZRAM_ATTR_RO(num_reads);
ZRAM_ATTR_RO(num_writes);
ZRAM_ATTR_RO(failed_reads);
ZRAM_ATTR_RO(failed_writes);
ZRAM_ATTR_RO(invalid_io);
ZRAM_ATTR_RO(notify_free);
ZRAM_ATTR_RO(zero_pages);
ZRAM_ATTR_RO(compr_data_size);
static struct attribute *zram_disk_attrs[] = {
&dev_attr_disksize.attr,
@ -793,12 +841,16 @@ static struct attribute *zram_disk_attrs[] = {
&dev_attr_reset.attr,
&dev_attr_num_reads.attr,
&dev_attr_num_writes.attr,
&dev_attr_failed_reads.attr,
&dev_attr_failed_writes.attr,
&dev_attr_invalid_io.attr,
&dev_attr_notify_free.attr,
&dev_attr_zero_pages.attr,
&dev_attr_orig_data_size.attr,
&dev_attr_compr_data_size.attr,
&dev_attr_mem_used_total.attr,
&dev_attr_max_comp_streams.attr,
&dev_attr_comp_algorithm.attr,
NULL,
};
@ -839,7 +891,8 @@ static int create_device(struct zram *zram, int device_id)
/* Actual capacity set using syfs (/sys/block/zram<id>/disksize */
set_capacity(zram->disk, 0);
/* zram devices sort of resembles non-rotational disks */
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, zram->disk->queue);
/*
* To ensure that we always get PAGE_SIZE aligned
* and n*PAGE_SIZED sized I/O requests.
@ -849,6 +902,21 @@ static int create_device(struct zram *zram, int device_id)
ZRAM_LOGICAL_BLOCK_SIZE);
blk_queue_io_min(zram->disk->queue, PAGE_SIZE);
blk_queue_io_opt(zram->disk->queue, PAGE_SIZE);
zram->disk->queue->limits.discard_granularity = PAGE_SIZE;
zram->disk->queue->limits.max_discard_sectors = UINT_MAX;
/*
* zram_bio_discard() will clear all logical blocks if logical block
* size is identical with physical block size(PAGE_SIZE). But if it is
* different, we will skip discarding some parts of logical blocks in
* the part of the request range which isn't aligned to physical block
* size. So we can't ensure that all discarded logical blocks are
* zeroed.
*/
if (ZRAM_LOGICAL_BLOCK_SIZE == PAGE_SIZE)
zram->disk->queue->limits.discard_zeroes_data = 1;
else
zram->disk->queue->limits.discard_zeroes_data = 0;
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, zram->disk->queue);
add_disk(zram->disk);
@ -858,8 +926,9 @@ static int create_device(struct zram *zram, int device_id)
pr_warn("Error creating sysfs group");
goto out_free_disk;
}
zram->init_done = 0;
strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor));
zram->meta = NULL;
zram->max_comp_streams = 1;
return 0;
out_free_disk:

21
drivers/block/zram/zram_drv.h
View File

@ -16,9 +16,10 @@
#define _ZRAM_DRV_H_
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/zsmalloc.h>
#include "zcomp.h"
/*
* Some arbitrary value. This is just to catch
* invalid value for num_devices module parameter.
@ -64,38 +65,33 @@ enum zram_pageflags {
struct table {
unsigned long handle;
u16 size; /* object size (excluding header) */
u8 count; /* object ref count (not yet used) */
u8 flags;
} __aligned(4);
struct zram_stats {
atomic64_t compr_size; /* compressed size of pages stored */
atomic64_t compr_data_size; /* compressed size of pages stored */
atomic64_t num_reads; /* failed + successful */
atomic64_t num_writes; /* --do-- */
atomic64_t failed_reads; /* should NEVER! happen */
atomic64_t failed_writes; /* can happen when memory is too low */
atomic64_t invalid_io; /* non-page-aligned I/O requests */
atomic64_t notify_free; /* no. of swap slot free notifications */
atomic_t pages_zero; /* no. of zero filled pages */
atomic_t pages_stored; /* no. of pages currently stored */
atomic_t good_compress; /* % of pages with compression ratio<=50% */
atomic_t bad_compress; /* % of pages with compression ratio>=75% */
atomic64_t zero_pages; /* no. of zero filled pages */
atomic64_t pages_stored; /* no. of pages currently stored */
};
struct zram_meta {
rwlock_t tb_lock; /* protect table */
void *compress_workmem;
void *compress_buffer;
struct table *table;
struct zs_pool *mem_pool;
struct mutex buffer_lock; /* protect compress buffers */
};
struct zram {
struct zram_meta *meta;
struct request_queue *queue;
struct gendisk *disk;
int init_done;
struct zcomp *comp;
/* Prevent concurrent execution of device init, reset and R/W request */
struct rw_semaphore init_lock;
/*
@ -103,7 +99,8 @@ struct zram {
* we can store in a disk.
*/
u64 disksize; /* bytes */
int max_comp_streams;
struct zram_stats stats;
char compressor[10];
};
#endif

2
drivers/char/tpm/Kconfig
View File

@ -74,7 +74,7 @@ config TCG_NSC
config TCG_ATMEL
tristate "Atmel TPM Interface"
depends on PPC64 || HAS_IOPORT
depends on PPC64 || HAS_IOPORT_MAP
---help---
If you have a TPM security chip from Atmel say Yes and it
will be accessible from within Linux. To compile this driver

2
drivers/i2c/busses/Kconfig
View File

@ -936,7 +936,7 @@ config I2C_ACORN
config I2C_ELEKTOR
tristate "Elektor ISA card"
depends on ISA && HAS_IOPORT && BROKEN_ON_SMP
depends on ISA && HAS_IOPORT_MAP && BROKEN_ON_SMP
select I2C_ALGOPCF
help
This supports the PCF8584 ISA bus I2C adapter. Say Y if you own

6
drivers/lguest/page_tables.c
View File

@ -887,7 +887,7 @@ void guest_new_pagetable(struct lg_cpu *cpu, unsigned long pgtable)
* _PAGE_ACCESSED then we can put a read-only PTE entry in immediately, and if
* they set _PAGE_DIRTY then we can put a writable PTE entry in immediately.
*/
static void do_set_pte(struct lg_cpu *cpu, int idx,
static void __guest_set_pte(struct lg_cpu *cpu, int idx,
unsigned long vaddr, pte_t gpte)
{
/* Look up the matching shadow page directory entry. */
@ -960,13 +960,13 @@ void guest_set_pte(struct lg_cpu *cpu,
unsigned int i;
for (i = 0; i < ARRAY_SIZE(cpu->lg->pgdirs); i++)
if (cpu->lg->pgdirs[i].pgdir)
do_set_pte(cpu, i, vaddr, gpte);
__guest_set_pte(cpu, i, vaddr, gpte);
} else {
/* Is this page table one we have a shadow for? */
int pgdir = find_pgdir(cpu->lg, gpgdir);
if (pgdir != ARRAY_SIZE(cpu->lg->pgdirs))
/* If so, do the update. */
do_set_pte(cpu, pgdir, vaddr, gpte);
__guest_set_pte(cpu, pgdir, vaddr, gpte);
}
}

6
drivers/misc/sgi-gru/grukdump.c
View File

@ -178,10 +178,10 @@ static int gru_dump_context(struct gru_state *gru, int ctxnum,
hdr.cbrcnt = cbrcnt;
hdr.dsrcnt = dsrcnt;
hdr.cch_locked = cch_locked;
if (!ret && copy_to_user((void __user *)uhdr, &hdr, sizeof(hdr)))
ret = -EFAULT;
if (copy_to_user(uhdr, &hdr, sizeof(hdr)))
return -EFAULT;
return ret ? ret : bytes;
return bytes;
}
int gru_dump_chiplet_request(unsigned long arg)

2
drivers/net/can/sja1000/Kconfig
View File

@ -39,7 +39,7 @@ config CAN_EMS_PCI
config CAN_PEAK_PCMCIA
tristate "PEAK PCAN-PC Card"
depends on PCMCIA
depends on HAS_IOPORT
depends on HAS_IOPORT_MAP
---help---
This driver is for the PCAN-PC Card PCMCIA adapter (1 or 2 channels)
from PEAK-System (http://www.peak-system.com). To compile this

2
drivers/net/ethernet/3com/Kconfig
View File

@ -66,7 +66,7 @@ config PCMCIA_3C589
config VORTEX
tristate "3c590/3c900 series (592/595/597) \"Vortex/Boomerang\" support"
depends on (PCI || EISA) && HAS_IOPORT
depends on (PCI || EISA) && HAS_IOPORT_MAP
select MII
---help---
This option enables driver support for a large number of 10Mbps and

1
drivers/net/rionet.c
View File

@ -493,6 +493,7 @@ static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev)
ndev->netdev_ops = &rionet_netdev_ops;
ndev->mtu = RIO_MAX_MSG_SIZE - 14;
ndev->features = NETIF_F_LLTX;
SET_NETDEV_DEV(ndev, &mport->dev);
SET_ETHTOOL_OPS(ndev, &rionet_ethtool_ops);
spin_lock_init(&rnet->lock);

1
drivers/rapidio/devices/tsi721.c
View File

@ -2256,6 +2256,7 @@ static int tsi721_setup_mport(struct tsi721_device *priv)
mport->phy_type = RIO_PHY_SERIAL;
mport->priv = (void *)priv;
mport->phys_efptr = 0x100;
mport->dev.parent = &pdev->dev;
priv->mport = mport;
INIT_LIST_HEAD(&mport->dbells);

4
drivers/rapidio/devices/tsi721.h
View File

@ -644,6 +644,9 @@ enum tsi721_smsg_int_flag {
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
#define TSI721_BDMA_BD_RING_SZ 128
#define TSI721_BDMA_MAX_BCOUNT (TSI721_DMAD_BCOUNT1 + 1)
struct tsi721_tx_desc {
struct dma_async_tx_descriptor txd;
struct tsi721_dma_desc *hw_desc;
@ -652,6 +655,7 @@ struct tsi721_tx_desc {
u64 rio_addr;
/* upper 2-bits of 66-bit RIO address */
u8 rio_addr_u;
u32 bcount;
bool interrupt;
struct list_head desc_node;
struct list_head tx_list;

111
drivers/rapidio/devices/tsi721_dma.c
View File

@ -304,35 +304,17 @@ struct tsi721_tx_desc *tsi721_desc_get(struct tsi721_bdma_chan *bdma_chan)
}
static int
tsi721_fill_desc(struct tsi721_bdma_chan *bdma_chan,
struct tsi721_tx_desc *desc, struct scatterlist *sg,
tsi721_desc_fill_init(struct tsi721_tx_desc *desc, struct scatterlist *sg,
enum dma_rtype rtype, u32 sys_size)
{
struct tsi721_dma_desc *bd_ptr = desc->hw_desc;
u64 rio_addr;
if (sg_dma_len(sg) > TSI721_DMAD_BCOUNT1 + 1) {
dev_err(bdma_chan->dchan.device->dev,
"SG element is too large\n");
return -EINVAL;
}
dev_dbg(bdma_chan->dchan.device->dev,
"desc: 0x%llx, addr: 0x%llx len: 0x%x\n",
(u64)desc->txd.phys, (unsigned long long)sg_dma_address(sg),
sg_dma_len(sg));
dev_dbg(bdma_chan->dchan.device->dev,
"bd_ptr = %p did=%d raddr=0x%llx\n",
bd_ptr, desc->destid, desc->rio_addr);
/* Initialize DMA descriptor */
bd_ptr->type_id = cpu_to_le32((DTYPE1 << 29) |
(rtype << 19) | desc->destid);
if (desc->interrupt)
bd_ptr->type_id |= cpu_to_le32(TSI721_DMAD_IOF);
bd_ptr->bcount = cpu_to_le32(((desc->rio_addr & 0x3) << 30) |
(sys_size << 26) | sg_dma_len(sg));
(sys_size << 26));
rio_addr = (desc->rio_addr >> 2) |
((u64)(desc->rio_addr_u & 0x3) << 62);
bd_ptr->raddr_lo = cpu_to_le32(rio_addr & 0xffffffff);
@ -346,6 +328,20 @@ tsi721_fill_desc(struct tsi721_bdma_chan *bdma_chan,
return 0;
}
static int
tsi721_desc_fill_end(struct tsi721_tx_desc *desc)
{
struct tsi721_dma_desc *bd_ptr = desc->hw_desc;
/* Update DMA descriptor */
if (desc->interrupt)
bd_ptr->type_id |= cpu_to_le32(TSI721_DMAD_IOF);
bd_ptr->bcount |= cpu_to_le32(desc->bcount & TSI721_DMAD_BCOUNT1);
return 0;
}
static void tsi721_dma_chain_complete(struct tsi721_bdma_chan *bdma_chan,
struct tsi721_tx_desc *desc)
{
@ -674,6 +670,7 @@ struct dma_async_tx_descriptor *tsi721_prep_rio_sg(struct dma_chan *dchan,
unsigned int i;
u32 sys_size = dma_to_mport(dchan->device)->sys_size;
enum dma_rtype rtype;
dma_addr_t next_addr = -1;
if (!sgl || !sg_len) {
dev_err(dchan->device->dev, "%s: No SG list\n", __func__);
@ -704,36 +701,84 @@ struct dma_async_tx_descriptor *tsi721_prep_rio_sg(struct dma_chan *dchan,
for_each_sg(sgl, sg, sg_len, i) {
int err;
dev_dbg(dchan->device->dev, "%s: sg #%d\n", __func__, i);
if (sg_dma_len(sg) > TSI721_BDMA_MAX_BCOUNT) {
dev_err(dchan->device->dev,
"%s: SG entry %d is too large\n", __func__, i);
goto err_desc_put;
}
/*
* If this sg entry forms contiguous block with previous one,
* try to merge it into existing DMA descriptor
*/
if (desc) {
if (next_addr == sg_dma_address(sg) &&
desc->bcount + sg_dma_len(sg) <=
TSI721_BDMA_MAX_BCOUNT) {
/* Adjust byte count of the descriptor */
desc->bcount += sg_dma_len(sg);
goto entry_done;
}
/*
* Finalize this descriptor using total
* byte count value.
*/
tsi721_desc_fill_end(desc);
dev_dbg(dchan->device->dev, "%s: desc final len: %d\n",
__func__, desc->bcount);
}
/*
* Obtain and initialize a new descriptor
*/
desc = tsi721_desc_get(bdma_chan);
if (!desc) {
dev_err(dchan->device->dev,
"Not enough descriptors available\n");
goto err_desc_get;
"%s: Failed to get new descriptor for SG %d\n",
__func__, i);
goto err_desc_put;
}
if (sg_is_last(sg))
desc->interrupt = (flags & DMA_PREP_INTERRUPT) != 0;
else
desc->interrupt = false;
desc->destid = rext->destid;
desc->rio_addr = rio_addr;
desc->rio_addr_u = 0;
desc->bcount = sg_dma_len(sg);
err = tsi721_fill_desc(bdma_chan, desc, sg, rtype, sys_size);
dev_dbg(dchan->device->dev,
"sg%d desc: 0x%llx, addr: 0x%llx len: %d\n",
i, (u64)desc->txd.phys,
(unsigned long long)sg_dma_address(sg),
sg_dma_len(sg));
dev_dbg(dchan->device->dev,
"bd_ptr = %p did=%d raddr=0x%llx\n",
desc->hw_desc, desc->destid, desc->rio_addr);
err = tsi721_desc_fill_init(desc, sg, rtype, sys_size);
if (err) {
dev_err(dchan->device->dev,
"Failed to build desc: %d\n", err);
goto err_desc_get;
goto err_desc_put;
}
rio_addr += sg_dma_len(sg);
next_addr = sg_dma_address(sg);
if (!first)
first = desc;
else
list_add_tail(&desc->desc_node, &first->tx_list);
entry_done:
if (sg_is_last(sg)) {
desc->interrupt = (flags & DMA_PREP_INTERRUPT) != 0;
tsi721_desc_fill_end(desc);
dev_dbg(dchan->device->dev, "%s: desc final len: %d\n",
__func__, desc->bcount);
} else {
rio_addr += sg_dma_len(sg);
next_addr += sg_dma_len(sg);
}
}
first->txd.cookie = -EBUSY;
@ -741,7 +786,7 @@ struct dma_async_tx_descriptor *tsi721_prep_rio_sg(struct dma_chan *dchan,
return &first->txd;
err_desc_get:
err_desc_put:
tsi721_desc_put(bdma_chan, first);
return NULL;
}
@ -792,7 +837,7 @@ int tsi721_register_dma(struct tsi721_device *priv)
if (i == TSI721_DMACH_MAINT)
continue;
bdma_chan->bd_num = 64;
bdma_chan->bd_num = TSI721_BDMA_BD_RING_SZ;
bdma_chan->regs = priv->regs + TSI721_DMAC_BASE(i);
bdma_chan->dchan.device = &mport->dma;

22
drivers/rapidio/rio-driver.c
View File

@ -167,7 +167,6 @@ void rio_unregister_driver(struct rio_driver *rdrv)
void rio_attach_device(struct rio_dev *rdev)
{
rdev->dev.bus = &rio_bus_type;
rdev->dev.parent = &rio_bus;
}
EXPORT_SYMBOL_GPL(rio_attach_device);
@ -216,9 +215,12 @@ static int rio_uevent(struct device *dev, struct kobj_uevent_env *env)
return 0;
}
struct device rio_bus = {
.init_name = "rapidio",
struct class rio_mport_class = {
.name = "rapidio_port",
.owner = THIS_MODULE,
.dev_groups = rio_mport_groups,
};
EXPORT_SYMBOL_GPL(rio_mport_class);
struct bus_type rio_bus_type = {
.name = "rapidio",
@ -233,14 +235,20 @@ struct bus_type rio_bus_type = {
/**
* rio_bus_init - Register the RapidIO bus with the device model
*
* Registers the RIO bus device and RIO bus type with the Linux
* Registers the RIO mport device class and RIO bus type with the Linux
* device model.
*/
static int __init rio_bus_init(void)
{
if (device_register(&rio_bus) < 0)
printk("RIO: failed to register RIO bus device\n");
return bus_register(&rio_bus_type);
int ret;
ret = class_register(&rio_mport_class);
if (!ret) {
ret = bus_register(&rio_bus_type);
if (ret)
class_unregister(&rio_mport_class);
}
return ret;
}
postcore_initcall(rio_bus_init);

1
drivers/rapidio/rio-scan.c
View File

@ -461,6 +461,7 @@ static struct rio_dev *rio_setup_device(struct rio_net *net,
rdev->comp_tag & RIO_CTAG_UDEVID);
}
rdev->dev.parent = &port->dev;
rio_attach_device(rdev);
device_initialize(&rdev->dev);

40
drivers/rapidio/rio-sysfs.c
View File

@ -341,3 +341,43 @@ const struct attribute_group *rio_bus_groups[] = {
&rio_bus_group,
NULL,
};
static ssize_t
port_destid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct rio_mport *mport = to_rio_mport(dev);
if (mport)
return sprintf(buf, "0x%04x\n", mport->host_deviceid);
else
return -ENODEV;
}
static DEVICE_ATTR_RO(port_destid);
static ssize_t sys_size_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct rio_mport *mport = to_rio_mport(dev);
if (mport)
return sprintf(buf, "%u\n", mport->sys_size);
else
return -ENODEV;
}
static DEVICE_ATTR_RO(sys_size);
static struct attribute *rio_mport_attrs[] = {
&dev_attr_port_destid.attr,
&dev_attr_sys_size.attr,
NULL,
};
static const struct attribute_group rio_mport_group = {
.attrs = rio_mport_attrs,
};
const struct attribute_group *rio_mport_groups[] = {
&rio_mport_group,
NULL,
};

11
drivers/rapidio/rio.c
View File

@ -1884,6 +1884,7 @@ static int rio_get_hdid(int index)
int rio_register_mport(struct rio_mport *port)
{
struct rio_scan_node *scan = NULL;
int res = 0;
if (next_portid >= RIO_MAX_MPORTS) {
pr_err("RIO: reached specified max number of mports\n");
@ -1894,6 +1895,16 @@ int rio_register_mport(struct rio_mport *port)
port->host_deviceid = rio_get_hdid(port->id);
port->nscan = NULL;
dev_set_name(&port->dev, "rapidio%d", port->id);
port->dev.class = &rio_mport_class;
res = device_register(&port->dev);
if (res)
dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n",
port->id, res);
else
dev_dbg(&port->dev, "RIO: mport%d registered\n", port->id);
mutex_lock(&rio_mport_list_lock);
list_add_tail(&port->node, &rio_mports);

1
drivers/rapidio/rio.h
View File

@ -50,6 +50,7 @@ extern int rio_mport_scan(int mport_id);
/* Structures internal to the RIO core code */
extern const struct attribute_group *rio_dev_groups[];
extern const struct attribute_group *rio_bus_groups[];
extern const struct attribute_group *rio_mport_groups[];
#define RIO_GET_DID(size, x) (size ? (x & 0xffff) : ((x & 0x00ff0000) >> 16))
#define RIO_SET_DID(size, x) (size ? (x & 0xffff) : ((x & 0x000000ff) << 16))

2
fs/9p/vfs_file.c
View File

@ -832,6 +832,7 @@ static void v9fs_mmap_vm_close(struct vm_area_struct *vma)
static const struct vm_operations_struct v9fs_file_vm_ops = {
.fault = filemap_fault,
.map_pages = filemap_map_pages,
.page_mkwrite = v9fs_vm_page_mkwrite,
.remap_pages = generic_file_remap_pages,
};
@ -839,6 +840,7 @@ static const struct vm_operations_struct v9fs_file_vm_ops = {
static const struct vm_operations_struct v9fs_mmap_file_vm_ops = {
.close = v9fs_mmap_vm_close,
.fault = filemap_fault,
.map_pages = filemap_map_pages,
.page_mkwrite = v9fs_vm_page_mkwrite,
.remap_pages = generic_file_remap_pages,
};

2
fs/adfs/super.c
View File

@ -266,7 +266,7 @@ static void init_once(void *foo)
inode_init_once(&ei->vfs_inode);
}
static int init_inodecache(void)
static int __init init_inodecache(void)
{
adfs_inode_cachep = kmem_cache_create("adfs_inode_cache",
sizeof(struct adfs_inode_info),

20
fs/affs/affs.h
View File

@ -5,14 +5,6 @@
#include <linux/mutex.h>
#include <linux/workqueue.h>
/* AmigaOS allows file names with up to 30 characters length.
* Names longer than that will be silently truncated. If you
* want to disallow this, comment out the following #define.
* Creating filesystem objects with longer names will then
* result in an error (ENAMETOOLONG).
*/
/*#define AFFS_NO_TRUNCATE */
/* Ugly macros make the code more pretty. */
#define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
@ -28,7 +20,6 @@
#define AFFS_CACHE_SIZE PAGE_SIZE
#define AFFS_MAX_PREALLOC 32
#define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2)
#define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
#define AFFS_AC_MASK (AFFS_AC_SIZE-1)
@ -118,6 +109,7 @@ struct affs_sb_info {
#define SF_OFS 0x0200 /* Old filesystem */
#define SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
#define SF_VERBOSE 0x0800 /* Talk about fs when mounting */
#define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */
/* short cut to get to the affs specific sb data */
static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
@ -137,9 +129,13 @@ extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
extern void secs_to_datestamp(time_t secs, struct affs_date *ds);
extern umode_t prot_to_mode(u32 prot);
extern void mode_to_prot(struct inode *inode);
extern void affs_error(struct super_block *sb, const char *function, const char *fmt, ...);
extern void affs_warning(struct super_block *sb, const char *function, const char *fmt, ...);
extern int affs_check_name(const unsigned char *name, int len);
extern void affs_error(struct super_block *sb, const char *function,
const char *fmt, ...);
extern void affs_warning(struct super_block *sb, const char *function,
const char *fmt, ...);
extern bool affs_nofilenametruncate(const struct dentry *dentry);
extern int affs_check_name(const unsigned char *name, int len,
bool notruncate);
extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry);
/* bitmap. c */

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