2005-04-16 16:20:36 -06:00
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#ifndef _LINUX_KERNEL_H
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#define _LINUX_KERNEL_H
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/*
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* 'kernel.h' contains some often-used function prototypes etc
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*/
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#ifdef __KERNEL__
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#include <stdarg.h>
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#include <linux/linkage.h>
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#include <linux/stddef.h>
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#include <linux/types.h>
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#include <linux/compiler.h>
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#include <linux/bitops.h>
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2006-12-08 03:37:49 -07:00
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#include <linux/log2.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/byteorder.h>
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#include <asm/bug.h>
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2007-01-10 06:45:28 -07:00
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extern const char linux_banner[];
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extern const char linux_proc_banner[];
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2008-04-29 02:00:55 -06:00
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#define USHORT_MAX ((u16)(~0U))
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#define SHORT_MAX ((s16)(USHORT_MAX>>1))
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#define SHORT_MIN (-SHORT_MAX - 1)
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2005-04-16 16:20:36 -06:00
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#define INT_MAX ((int)(~0U>>1))
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#define INT_MIN (-INT_MAX - 1)
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#define UINT_MAX (~0U)
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#define LONG_MAX ((long)(~0UL>>1))
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#define LONG_MIN (-LONG_MAX - 1)
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#define ULONG_MAX (~0UL)
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[PATCH] writeback: fix range handling
When a writeback_control's `start' and `end' fields are used to
indicate a one-byte-range starting at file offset zero, the required
values of .start=0,.end=0 mean that the ->writepages() implementation
has no way of telling that it is being asked to perform a range
request. Because we're currently overloading (start == 0 && end == 0)
to mean "this is not a write-a-range request".
To make all this sane, the patch changes range of writeback_control.
So caller does: If it is calling ->writepages() to write pages, it
sets range (range_start/end or range_cyclic) always.
And if range_cyclic is true, ->writepages() thinks the range is
cyclic, otherwise it just uses range_start and range_end.
This patch does,
- Add LLONG_MAX, LLONG_MIN, ULLONG_MAX to include/linux/kernel.h
-1 is usually ok for range_end (type is long long). But, if someone did,
range_end += val; range_end is "val - 1"
u64val = range_end >> bits; u64val is "~(0ULL)"
or something, they are wrong. So, this adds LLONG_MAX to avoid nasty
things, and uses LLONG_MAX for range_end.
- All callers of ->writepages() sets range_start/end or range_cyclic.
- Fix updates of ->writeback_index. It seems already bit strange.
If it starts at 0 and ended by check of nr_to_write, this last
index may reduce chance to scan end of file. So, this updates
->writeback_index only if range_cyclic is true or whole-file is
scanned.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Anton Altaparmakov <aia21@cantab.net>
Cc: Steven French <sfrench@us.ibm.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23 03:03:26 -06:00
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#define LLONG_MAX ((long long)(~0ULL>>1))
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#define LLONG_MIN (-LLONG_MAX - 1)
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#define ULLONG_MAX (~0ULL)
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2005-04-16 16:20:36 -06:00
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#define STACK_MAGIC 0xdeadbeef
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2006-11-26 20:05:22 -07:00
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#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
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#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
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2007-09-11 16:23:47 -06:00
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#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
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2008-02-06 02:37:05 -07:00
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#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
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2006-11-26 20:05:22 -07:00
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2007-05-06 15:51:05 -06:00
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
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2006-06-26 05:57:28 -06:00
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#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
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2006-09-26 00:32:40 -06:00
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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2006-07-10 05:44:54 -06:00
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#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
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2005-04-16 16:20:36 -06:00
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2008-07-05 03:14:23 -06:00
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#define _RET_IP_ (unsigned long)__builtin_return_address(0)
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#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
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2007-10-12 04:40:38 -06:00
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#ifdef CONFIG_LBD
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# include <asm/div64.h>
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# define sector_div(a, b) do_div(a, b)
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#else
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# define sector_div(n, b)( \
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{ \
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int _res; \
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_res = (n) % (b); \
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(n) /= (b); \
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_res; \
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} \
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)
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#endif
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2007-05-10 04:15:18 -06:00
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/**
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* upper_32_bits - return bits 32-63 of a number
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* @n: the number we're accessing
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*
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* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress
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* the "right shift count >= width of type" warning when that quantity is
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* 32-bits.
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*/
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#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
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2005-04-16 16:20:36 -06:00
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#define KERN_EMERG "<0>" /* system is unusable */
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#define KERN_ALERT "<1>" /* action must be taken immediately */
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#define KERN_CRIT "<2>" /* critical conditions */
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#define KERN_ERR "<3>" /* error conditions */
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#define KERN_WARNING "<4>" /* warning conditions */
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#define KERN_NOTICE "<5>" /* normal but significant condition */
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#define KERN_INFO "<6>" /* informational */
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#define KERN_DEBUG "<7>" /* debug-level messages */
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2007-10-17 00:30:29 -06:00
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/*
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* Annotation for a "continued" line of log printout (only done after a
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* line that had no enclosing \n). Only to be used by core/arch code
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* during early bootup (a continued line is not SMP-safe otherwise).
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*/
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#define KERN_CONT ""
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2005-04-16 16:20:36 -06:00
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extern int console_printk[];
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#define console_loglevel (console_printk[0])
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#define default_message_loglevel (console_printk[1])
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#define minimum_console_loglevel (console_printk[2])
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#define default_console_loglevel (console_printk[3])
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struct completion;
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2006-01-09 21:51:37 -07:00
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struct pt_regs;
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struct user;
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2005-04-16 16:20:36 -06:00
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/**
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* might_sleep - annotation for functions that can sleep
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*
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* this macro will print a stack trace if it is executed in an atomic
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* context (spinlock, irq-handler, ...).
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*
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* This is a useful debugging help to be able to catch problems early and not
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2006-11-29 20:46:13 -07:00
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* be bitten later when the calling function happens to sleep when it is not
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2005-04-16 16:20:36 -06:00
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* supposed to.
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*/
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2005-06-25 15:57:39 -06:00
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#ifdef CONFIG_PREEMPT_VOLUNTARY
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2008-01-25 13:08:28 -07:00
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extern int _cond_resched(void);
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# define might_resched() _cond_resched()
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2005-06-25 15:57:39 -06:00
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#else
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# define might_resched() do { } while (0)
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#endif
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2005-04-16 16:20:36 -06:00
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#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
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2005-06-25 15:57:39 -06:00
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void __might_sleep(char *file, int line);
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# define might_sleep() \
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do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0)
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2005-04-16 16:20:36 -06:00
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#else
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2005-06-25 15:57:39 -06:00
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# define might_sleep() do { might_resched(); } while (0)
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2005-04-16 16:20:36 -06:00
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#endif
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2006-06-23 03:05:42 -06:00
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#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
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2005-06-25 15:57:39 -06:00
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2005-04-16 16:20:36 -06:00
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#define abs(x) ({ \
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int __x = (x); \
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(__x < 0) ? -__x : __x; \
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})
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[PATCH] Notifier chain update: API changes
The kernel's implementation of notifier chains is unsafe. There is no
protection against entries being added to or removed from a chain while the
chain is in use. The issues were discussed in this thread:
http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
We noticed that notifier chains in the kernel fall into two basic usage
classes:
"Blocking" chains are always called from a process context
and the callout routines are allowed to sleep;
"Atomic" chains can be called from an atomic context and
the callout routines are not allowed to sleep.
We decided to codify this distinction and make it part of the API. Therefore
this set of patches introduces three new, parallel APIs: one for blocking
notifiers, one for atomic notifiers, and one for "raw" notifiers (which is
really just the old API under a new name). New kinds of data structures are
used for the heads of the chains, and new routines are defined for
registration, unregistration, and calling a chain. The three APIs are
explained in include/linux/notifier.h and their implementation is in
kernel/sys.c.
With atomic and blocking chains, the implementation guarantees that the chain
links will not be corrupted and that chain callers will not get messed up by
entries being added or removed. For raw chains the implementation provides no
guarantees at all; users of this API must provide their own protections. (The
idea was that situations may come up where the assumptions of the atomic and
blocking APIs are not appropriate, so it should be possible for users to
handle these things in their own way.)
There are some limitations, which should not be too hard to live with. For
atomic/blocking chains, registration and unregistration must always be done in
a process context since the chain is protected by a mutex/rwsem. Also, a
callout routine for a non-raw chain must not try to register or unregister
entries on its own chain. (This did happen in a couple of places and the code
had to be changed to avoid it.)
Since atomic chains may be called from within an NMI handler, they cannot use
spinlocks for synchronization. Instead we use RCU. The overhead falls almost
entirely in the unregister routine, which is okay since unregistration is much
less frequent that calling a chain.
Here is the list of chains that we adjusted and their classifications. None
of them use the raw API, so for the moment it is only a placeholder.
ATOMIC CHAINS
-------------
arch/i386/kernel/traps.c: i386die_chain
arch/ia64/kernel/traps.c: ia64die_chain
arch/powerpc/kernel/traps.c: powerpc_die_chain
arch/sparc64/kernel/traps.c: sparc64die_chain
arch/x86_64/kernel/traps.c: die_chain
drivers/char/ipmi/ipmi_si_intf.c: xaction_notifier_list
kernel/panic.c: panic_notifier_list
kernel/profile.c: task_free_notifier
net/bluetooth/hci_core.c: hci_notifier
net/ipv4/netfilter/ip_conntrack_core.c: ip_conntrack_chain
net/ipv4/netfilter/ip_conntrack_core.c: ip_conntrack_expect_chain
net/ipv6/addrconf.c: inet6addr_chain
net/netfilter/nf_conntrack_core.c: nf_conntrack_chain
net/netfilter/nf_conntrack_core.c: nf_conntrack_expect_chain
net/netlink/af_netlink.c: netlink_chain
BLOCKING CHAINS
---------------
arch/powerpc/platforms/pseries/reconfig.c: pSeries_reconfig_chain
arch/s390/kernel/process.c: idle_chain
arch/x86_64/kernel/process.c idle_notifier
drivers/base/memory.c: memory_chain
drivers/cpufreq/cpufreq.c cpufreq_policy_notifier_list
drivers/cpufreq/cpufreq.c cpufreq_transition_notifier_list
drivers/macintosh/adb.c: adb_client_list
drivers/macintosh/via-pmu.c sleep_notifier_list
drivers/macintosh/via-pmu68k.c sleep_notifier_list
drivers/macintosh/windfarm_core.c wf_client_list
drivers/usb/core/notify.c usb_notifier_list
drivers/video/fbmem.c fb_notifier_list
kernel/cpu.c cpu_chain
kernel/module.c module_notify_list
kernel/profile.c munmap_notifier
kernel/profile.c task_exit_notifier
kernel/sys.c reboot_notifier_list
net/core/dev.c netdev_chain
net/decnet/dn_dev.c: dnaddr_chain
net/ipv4/devinet.c: inetaddr_chain
It's possible that some of these classifications are wrong. If they are,
please let us know or submit a patch to fix them. Note that any chain that
gets called very frequently should be atomic, because the rwsem read-locking
used for blocking chains is very likely to incur cache misses on SMP systems.
(However, if the chain's callout routines may sleep then the chain cannot be
atomic.)
The patch set was written by Alan Stern and Chandra Seetharaman, incorporating
material written by Keith Owens and suggestions from Paul McKenney and Andrew
Morton.
[jes@sgi.com: restructure the notifier chain initialization macros]
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-27 02:16:30 -07:00
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extern struct atomic_notifier_head panic_notifier_list;
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2005-04-16 16:20:36 -06:00
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extern long (*panic_blink)(long time);
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NORET_TYPE void panic(const char * fmt, ...)
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2007-07-21 09:10:00 -06:00
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__attribute__ ((NORET_AND format (printf, 1, 2))) __cold;
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2006-03-23 04:00:57 -07:00
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extern void oops_enter(void);
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extern void oops_exit(void);
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extern int oops_may_print(void);
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2008-02-08 05:19:55 -07:00
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NORET_TYPE void do_exit(long error_code)
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2005-04-16 16:20:36 -06:00
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ATTRIB_NORET;
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NORET_TYPE void complete_and_exit(struct completion *, long)
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ATTRIB_NORET;
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extern unsigned long simple_strtoul(const char *,char **,unsigned int);
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extern long simple_strtol(const char *,char **,unsigned int);
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extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
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extern long long simple_strtoll(const char *,char **,unsigned int);
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Add new string functions strict_strto* and convert kernel params to use them
Currently, for every sysfs node, the callers will be responsible for
implementing store operation, so many many callers are doing duplicate
things to validate input, they have the same mistakes because they are
calling simple_strtol/ul/ll/uul, especially for module params, they are
just numeric, but you can echo such values as 0x1234xxx, 07777888 and
1234aaa, for these cases, module params store operation just ignores
succesive invalid char and converts prefix part to a numeric although input
is acctually invalid.
This patch tries to fix the aforementioned issues and implements
strict_strtox serial functions, kernel/params.c uses them to strictly
validate input, so module params will reject such values as 0x1234xxxx and
returns an error:
write error: Invalid argument
Any modules which export numeric sysfs node can use strict_strtox instead of
simple_strtox to reject any invalid input.
Here are some test results:
Before applying this patch:
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 0x1000 > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 0x1000g > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 0x1000gggggggg > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 010000 > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 0100008 > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 010000aaaaa > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]#
After applying this patch:
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 0x1000 > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 0x1000g > /sys/module/e1000/parameters/copybreak
-bash: echo: write error: Invalid argument
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo 0x1000gggggggg > /sys/module/e1000/parameters/copybreak
-bash: echo: write error: Invalid argument
[root@yangyi-dev /]# echo 010000 > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# echo 0100008 > /sys/module/e1000/parameters/copybreak
-bash: echo: write error: Invalid argument
[root@yangyi-dev /]# echo 010000aaaaa > /sys/module/e1000/parameters/copybreak
-bash: echo: write error: Invalid argument
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]# echo -n 4096 > /sys/module/e1000/parameters/copybreak
[root@yangyi-dev /]# cat /sys/module/e1000/parameters/copybreak
4096
[root@yangyi-dev /]#
[akpm@linux-foundation.org: fix compiler warnings]
[akpm@linux-foundation.org: fix off-by-one found by tiwai@suse.de]
Signed-off-by: Yi Yang <yi.y.yang@intel.com>
Cc: Greg KH <greg@kroah.com>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-08 05:21:57 -07:00
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extern int strict_strtoul(const char *, unsigned int, unsigned long *);
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extern int strict_strtol(const char *, unsigned int, long *);
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extern int strict_strtoull(const char *, unsigned int, unsigned long long *);
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extern int strict_strtoll(const char *, unsigned int, long long *);
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2005-04-16 16:20:36 -06:00
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extern int sprintf(char * buf, const char * fmt, ...)
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__attribute__ ((format (printf, 2, 3)));
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extern int vsprintf(char *buf, const char *, va_list)
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__attribute__ ((format (printf, 2, 0)));
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extern int snprintf(char * buf, size_t size, const char * fmt, ...)
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__attribute__ ((format (printf, 3, 4)));
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extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
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__attribute__ ((format (printf, 3, 0)));
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extern int scnprintf(char * buf, size_t size, const char * fmt, ...)
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__attribute__ ((format (printf, 3, 4)));
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extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
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__attribute__ ((format (printf, 3, 0)));
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2006-06-25 06:49:17 -06:00
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extern char *kasprintf(gfp_t gfp, const char *fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 2, 3)));
|
2007-04-30 16:09:56 -06:00
|
|
|
extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
extern int sscanf(const char *, const char *, ...)
|
|
|
|
__attribute__ ((format (scanf, 2, 3)));
|
|
|
|
extern int vsscanf(const char *, const char *, va_list)
|
|
|
|
__attribute__ ((format (scanf, 2, 0)));
|
|
|
|
|
|
|
|
extern int get_option(char **str, int *pint);
|
|
|
|
extern char *get_options(const char *str, int nints, int *ints);
|
|
|
|
extern unsigned long long memparse(char *ptr, char **retptr);
|
|
|
|
|
2006-05-15 10:44:06 -06:00
|
|
|
extern int core_kernel_text(unsigned long addr);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int __kernel_text_address(unsigned long addr);
|
|
|
|
extern int kernel_text_address(unsigned long addr);
|
2007-02-12 01:52:56 -07:00
|
|
|
struct pid;
|
|
|
|
extern struct pid *session_of_pgrp(struct pid *pgrp);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-05-01 09:59:02 -06:00
|
|
|
#ifdef CONFIG_PRINTK
|
2005-04-16 16:20:36 -06:00
|
|
|
asmlinkage int vprintk(const char *fmt, va_list args)
|
|
|
|
__attribute__ ((format (printf, 1, 0)));
|
|
|
|
asmlinkage int printk(const char * fmt, ...)
|
2007-07-21 09:10:00 -06:00
|
|
|
__attribute__ ((format (printf, 1, 2))) __cold;
|
2008-02-08 05:21:25 -07:00
|
|
|
|
|
|
|
extern int printk_ratelimit_jiffies;
|
|
|
|
extern int printk_ratelimit_burst;
|
|
|
|
extern int printk_ratelimit(void);
|
2008-04-29 01:59:43 -06:00
|
|
|
extern int __ratelimit(int ratelimit_jiffies, int ratelimit_burst);
|
2008-02-08 05:21:25 -07:00
|
|
|
extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst);
|
|
|
|
extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
|
|
|
|
unsigned int interval_msec);
|
2005-05-01 09:59:02 -06:00
|
|
|
#else
|
|
|
|
static inline int vprintk(const char *s, va_list args)
|
|
|
|
__attribute__ ((format (printf, 1, 0)));
|
|
|
|
static inline int vprintk(const char *s, va_list args) { return 0; }
|
|
|
|
static inline int printk(const char *s, ...)
|
|
|
|
__attribute__ ((format (printf, 1, 2)));
|
2007-07-21 09:10:00 -06:00
|
|
|
static inline int __cold printk(const char *s, ...) { return 0; }
|
2008-02-08 05:21:25 -07:00
|
|
|
static inline int printk_ratelimit(void) { return 0; }
|
|
|
|
static inline int __printk_ratelimit(int ratelimit_jiffies, \
|
|
|
|
int ratelimit_burst) { return 0; }
|
|
|
|
static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \
|
|
|
|
unsigned int interval_msec) \
|
|
|
|
{ return false; }
|
2005-05-01 09:59:02 -06:00
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-05-12 07:44:40 -06:00
|
|
|
extern void asmlinkage __attribute__((format(printf, 1, 2)))
|
2008-01-30 05:33:06 -07:00
|
|
|
early_printk(const char *fmt, ...);
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned long int_sqrt(unsigned long);
|
|
|
|
|
|
|
|
static inline void console_silent(void)
|
|
|
|
{
|
|
|
|
console_loglevel = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void console_verbose(void)
|
|
|
|
{
|
|
|
|
if (console_loglevel)
|
|
|
|
console_loglevel = 15;
|
|
|
|
}
|
|
|
|
|
|
|
|
extern void bust_spinlocks(int yes);
|
2007-02-10 02:46:19 -07:00
|
|
|
extern void wake_up_klogd(void);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
|
2006-04-10 23:53:59 -06:00
|
|
|
extern int panic_timeout;
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int panic_on_oops;
|
2006-09-26 02:52:27 -06:00
|
|
|
extern int panic_on_unrecovered_nmi;
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int tainted;
|
|
|
|
extern const char *print_tainted(void);
|
|
|
|
extern void add_taint(unsigned);
|
2008-02-08 05:19:31 -07:00
|
|
|
extern int root_mountflags;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Values used for system_state */
|
|
|
|
extern enum system_states {
|
|
|
|
SYSTEM_BOOTING,
|
|
|
|
SYSTEM_RUNNING,
|
|
|
|
SYSTEM_HALT,
|
|
|
|
SYSTEM_POWER_OFF,
|
|
|
|
SYSTEM_RESTART,
|
2005-12-01 02:29:00 -07:00
|
|
|
SYSTEM_SUSPEND_DISK,
|
2005-04-16 16:20:36 -06:00
|
|
|
} system_state;
|
|
|
|
|
|
|
|
#define TAINT_PROPRIETARY_MODULE (1<<0)
|
|
|
|
#define TAINT_FORCED_MODULE (1<<1)
|
|
|
|
#define TAINT_UNSAFE_SMP (1<<2)
|
|
|
|
#define TAINT_FORCED_RMMOD (1<<3)
|
|
|
|
#define TAINT_MACHINE_CHECK (1<<4)
|
|
|
|
#define TAINT_BAD_PAGE (1<<5)
|
2007-02-10 02:45:24 -07:00
|
|
|
#define TAINT_USER (1<<6)
|
2007-07-17 05:03:42 -06:00
|
|
|
#define TAINT_DIE (1<<7)
|
2008-02-04 16:04:50 -07:00
|
|
|
#define TAINT_OVERRIDDEN_ACPI_TABLE (1<<8)
|
2008-04-29 01:58:39 -06:00
|
|
|
#define TAINT_WARN (1<<9)
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-07-21 09:10:00 -06:00
|
|
|
extern void dump_stack(void) __cold;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-05-10 23:22:39 -06:00
|
|
|
enum {
|
|
|
|
DUMP_PREFIX_NONE,
|
|
|
|
DUMP_PREFIX_ADDRESS,
|
|
|
|
DUMP_PREFIX_OFFSET
|
|
|
|
};
|
2007-06-08 14:47:04 -06:00
|
|
|
extern void hex_dump_to_buffer(const void *buf, size_t len,
|
|
|
|
int rowsize, int groupsize,
|
|
|
|
char *linebuf, size_t linebuflen, bool ascii);
|
|
|
|
extern void print_hex_dump(const char *level, const char *prefix_str,
|
|
|
|
int prefix_type, int rowsize, int groupsize,
|
2007-08-07 14:43:14 -06:00
|
|
|
const void *buf, size_t len, bool ascii);
|
2007-06-08 14:47:04 -06:00
|
|
|
extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
|
2007-08-10 14:01:07 -06:00
|
|
|
const void *buf, size_t len);
|
2008-05-14 17:05:49 -06:00
|
|
|
|
|
|
|
extern const char hex_asc[];
|
|
|
|
#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
|
|
|
|
#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
|
|
|
|
|
|
|
|
static inline char *pack_hex_byte(char *buf, u8 byte)
|
|
|
|
{
|
|
|
|
*buf++ = hex_asc_hi(byte);
|
|
|
|
*buf++ = hex_asc_lo(byte);
|
|
|
|
return buf;
|
|
|
|
}
|
2007-05-10 23:22:39 -06:00
|
|
|
|
2007-10-17 00:29:48 -06:00
|
|
|
#define pr_emerg(fmt, arg...) \
|
|
|
|
printk(KERN_EMERG fmt, ##arg)
|
|
|
|
#define pr_alert(fmt, arg...) \
|
|
|
|
printk(KERN_ALERT fmt, ##arg)
|
|
|
|
#define pr_crit(fmt, arg...) \
|
|
|
|
printk(KERN_CRIT fmt, ##arg)
|
|
|
|
#define pr_err(fmt, arg...) \
|
|
|
|
printk(KERN_ERR fmt, ##arg)
|
|
|
|
#define pr_warning(fmt, arg...) \
|
|
|
|
printk(KERN_WARNING fmt, ##arg)
|
|
|
|
#define pr_notice(fmt, arg...) \
|
|
|
|
printk(KERN_NOTICE fmt, ##arg)
|
|
|
|
#define pr_info(fmt, arg...) \
|
|
|
|
printk(KERN_INFO fmt, ##arg)
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
#ifdef DEBUG
|
2006-08-07 17:37:15 -06:00
|
|
|
/* If you are writing a driver, please use dev_dbg instead */
|
2007-10-17 00:29:48 -06:00
|
|
|
#define pr_debug(fmt, arg...) \
|
|
|
|
printk(KERN_DEBUG fmt, ##arg)
|
2005-04-16 16:20:36 -06:00
|
|
|
#else
|
driver core: Convert debug functions declared inline __attribute__((format (printf,x,y) to statement expression macros
When DEBUG is not defined, pr_debug and dev_dbg and some
other local debugging functions are specified as:
"inline __attribute__((format (printf, x, y)))"
This is done to validate printk arguments when not debugging.
Converting these functions to macros or statement expressions
"do { if (0) printk(fmt, ##arg); } while (0)"
or
"({ if (0) printk(fmt, ##arg); 0; })
makes at least gcc 4.2.2 produce smaller objects.
This has the additional benefit of allowing the optimizer to
avoid calling functions like print_mac that might have been
arguments to the printk.
defconfig x86 current:
$ size vmlinux
text data bss dec hex filename
4716770 474560 618496 5809826 58a6a2 vmlinux
all converted: (More patches follow)
$ size vmlinux
text data bss dec hex filename
4716642 474560 618496 5809698 58a622 vmlinux
Even kernel/sched.o, which doesn't even use these
functions, becomes smaller.
It appears that merely having an indirect include
of <linux/device.h> can cause bigger objects.
$ size sched.inline.o sched.if0.o
text data bss dec hex filename
31385 2854 328 34567 8707 sched.inline.o
31366 2854 328 34548 86f4 sched.if0.o
The current preprocessed only kernel/sched.i file contains:
# 612 "include/linux/device.h"
static inline __attribute__((always_inline)) int __attribute__ ((format (printf, 2, 3)))
dev_dbg(struct device *dev, const char *fmt, ...)
{
return 0;
}
# 628 "include/linux/device.h"
static inline __attribute__((always_inline)) int __attribute__ ((format (printf, 2, 3)))
dev_vdbg(struct device *dev, const char *fmt, ...)
{
return 0;
}
Removing these unused inlines from sched.i shrinks sched.o
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-26 20:08:42 -07:00
|
|
|
#define pr_debug(fmt, arg...) \
|
|
|
|
({ if (0) printk(KERN_DEBUG fmt, ##arg); 0; })
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Display an IP address in readable format.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define NIPQUAD(addr) \
|
|
|
|
((unsigned char *)&addr)[0], \
|
|
|
|
((unsigned char *)&addr)[1], \
|
|
|
|
((unsigned char *)&addr)[2], \
|
|
|
|
((unsigned char *)&addr)[3]
|
2006-01-13 15:29:07 -07:00
|
|
|
#define NIPQUAD_FMT "%u.%u.%u.%u"
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#define NIP6(addr) \
|
|
|
|
ntohs((addr).s6_addr16[0]), \
|
|
|
|
ntohs((addr).s6_addr16[1]), \
|
|
|
|
ntohs((addr).s6_addr16[2]), \
|
|
|
|
ntohs((addr).s6_addr16[3]), \
|
|
|
|
ntohs((addr).s6_addr16[4]), \
|
|
|
|
ntohs((addr).s6_addr16[5]), \
|
|
|
|
ntohs((addr).s6_addr16[6]), \
|
|
|
|
ntohs((addr).s6_addr16[7])
|
2006-01-13 15:29:07 -07:00
|
|
|
#define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x"
|
2006-01-17 03:10:53 -07:00
|
|
|
#define NIP6_SEQFMT "%04x%04x%04x%04x%04x%04x%04x%04x"
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#if defined(__LITTLE_ENDIAN)
|
|
|
|
#define HIPQUAD(addr) \
|
|
|
|
((unsigned char *)&addr)[3], \
|
|
|
|
((unsigned char *)&addr)[2], \
|
|
|
|
((unsigned char *)&addr)[1], \
|
|
|
|
((unsigned char *)&addr)[0]
|
|
|
|
#elif defined(__BIG_ENDIAN)
|
|
|
|
#define HIPQUAD NIPQUAD
|
|
|
|
#else
|
|
|
|
#error "Please fix asm/byteorder.h"
|
|
|
|
#endif /* __LITTLE_ENDIAN */
|
|
|
|
|
|
|
|
/*
|
2008-04-30 01:54:55 -06:00
|
|
|
* min()/max()/clamp() macros that also do
|
2005-04-16 16:20:36 -06:00
|
|
|
* strict type-checking.. See the
|
|
|
|
* "unnecessary" pointer comparison.
|
|
|
|
*/
|
2008-04-30 01:54:55 -06:00
|
|
|
#define min(x, y) ({ \
|
|
|
|
typeof(x) _min1 = (x); \
|
|
|
|
typeof(y) _min2 = (y); \
|
|
|
|
(void) (&_min1 == &_min2); \
|
|
|
|
_min1 < _min2 ? _min1 : _min2; })
|
|
|
|
|
|
|
|
#define max(x, y) ({ \
|
|
|
|
typeof(x) _max1 = (x); \
|
|
|
|
typeof(y) _max2 = (y); \
|
|
|
|
(void) (&_max1 == &_max2); \
|
|
|
|
_max1 > _max2 ? _max1 : _max2; })
|
|
|
|
|
|
|
|
/**
|
|
|
|
* clamp - return a value clamped to a given range with strict typechecking
|
|
|
|
* @val: current value
|
|
|
|
* @min: minimum allowable value
|
|
|
|
* @max: maximum allowable value
|
|
|
|
*
|
|
|
|
* This macro does strict typechecking of min/max to make sure they are of the
|
|
|
|
* same type as val. See the unnecessary pointer comparisons.
|
|
|
|
*/
|
|
|
|
#define clamp(val, min, max) ({ \
|
|
|
|
typeof(val) __val = (val); \
|
|
|
|
typeof(min) __min = (min); \
|
|
|
|
typeof(max) __max = (max); \
|
|
|
|
(void) (&__val == &__min); \
|
|
|
|
(void) (&__val == &__max); \
|
|
|
|
__val = __val < __min ? __min: __val; \
|
|
|
|
__val > __max ? __max: __val; })
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* ..and if you can't take the strict
|
|
|
|
* types, you can specify one yourself.
|
|
|
|
*
|
2008-04-30 01:54:55 -06:00
|
|
|
* Or not use min/max/clamp at all, of course.
|
|
|
|
*/
|
|
|
|
#define min_t(type, x, y) ({ \
|
|
|
|
type __min1 = (x); \
|
|
|
|
type __min2 = (y); \
|
|
|
|
__min1 < __min2 ? __min1: __min2; })
|
|
|
|
|
|
|
|
#define max_t(type, x, y) ({ \
|
|
|
|
type __max1 = (x); \
|
|
|
|
type __max2 = (y); \
|
|
|
|
__max1 > __max2 ? __max1: __max2; })
|
|
|
|
|
|
|
|
/**
|
|
|
|
* clamp_t - return a value clamped to a given range using a given type
|
|
|
|
* @type: the type of variable to use
|
|
|
|
* @val: current value
|
|
|
|
* @min: minimum allowable value
|
|
|
|
* @max: maximum allowable value
|
|
|
|
*
|
|
|
|
* This macro does no typechecking and uses temporary variables of type
|
|
|
|
* 'type' to make all the comparisons.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
2008-04-30 01:54:55 -06:00
|
|
|
#define clamp_t(type, val, min, max) ({ \
|
|
|
|
type __val = (val); \
|
|
|
|
type __min = (min); \
|
|
|
|
type __max = (max); \
|
|
|
|
__val = __val < __min ? __min: __val; \
|
|
|
|
__val > __max ? __max: __val; })
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-04-30 01:54:55 -06:00
|
|
|
/**
|
|
|
|
* clamp_val - return a value clamped to a given range using val's type
|
|
|
|
* @val: current value
|
|
|
|
* @min: minimum allowable value
|
|
|
|
* @max: maximum allowable value
|
|
|
|
*
|
|
|
|
* This macro does no typechecking and uses temporary variables of whatever
|
|
|
|
* type the input argument 'val' is. This is useful when val is an unsigned
|
|
|
|
* type and min and max are literals that will otherwise be assigned a signed
|
|
|
|
* integer type.
|
|
|
|
*/
|
|
|
|
#define clamp_val(val, min, max) ({ \
|
|
|
|
typeof(val) __val = (val); \
|
|
|
|
typeof(val) __min = (min); \
|
|
|
|
typeof(val) __max = (max); \
|
|
|
|
__val = __val < __min ? __min: __val; \
|
|
|
|
__val > __max ? __max: __val; })
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/**
|
|
|
|
* container_of - cast a member of a structure out to the containing structure
|
|
|
|
* @ptr: the pointer to the member.
|
|
|
|
* @type: the type of the container struct this is embedded in.
|
|
|
|
* @member: the name of the member within the struct.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
#define container_of(ptr, type, member) ({ \
|
2007-05-12 17:28:35 -06:00
|
|
|
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
|
|
|
|
(type *)( (char *)__mptr - offsetof(type,member) );})
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2005-04-16 16:20:36 -06:00
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|
|
|
/*
|
|
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|
* Check at compile time that something is of a particular type.
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|
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|
* Always evaluates to 1 so you may use it easily in comparisons.
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|
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|
*/
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|
|
|
#define typecheck(type,x) \
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({ type __dummy; \
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typeof(x) __dummy2; \
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(void)(&__dummy == &__dummy2); \
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1; \
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|
})
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|
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|
2006-01-09 16:59:17 -07:00
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|
/*
|
|
|
|
* Check at compile time that 'function' is a certain type, or is a pointer
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|
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|
* to that type (needs to use typedef for the function type.)
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|
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|
*/
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|
|
#define typecheck_fn(type,function) \
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|
|
({ typeof(type) __tmp = function; \
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|
|
|
(void)__tmp; \
|
|
|
|
})
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|
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|
2007-02-10 02:46:00 -07:00
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|
struct sysinfo;
|
|
|
|
extern int do_sysinfo(struct sysinfo *info);
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|
|
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|
2005-04-16 16:20:36 -06:00
|
|
|
#endif /* __KERNEL__ */
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|
|
|
|
|
|
|
#define SI_LOAD_SHIFT 16
|
|
|
|
struct sysinfo {
|
|
|
|
long uptime; /* Seconds since boot */
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|
|
|
unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
|
|
|
|
unsigned long totalram; /* Total usable main memory size */
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|
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|
unsigned long freeram; /* Available memory size */
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|
|
unsigned long sharedram; /* Amount of shared memory */
|
|
|
|
unsigned long bufferram; /* Memory used by buffers */
|
|
|
|
unsigned long totalswap; /* Total swap space size */
|
|
|
|
unsigned long freeswap; /* swap space still available */
|
|
|
|
unsigned short procs; /* Number of current processes */
|
|
|
|
unsigned short pad; /* explicit padding for m68k */
|
|
|
|
unsigned long totalhigh; /* Total high memory size */
|
|
|
|
unsigned long freehigh; /* Available high memory size */
|
|
|
|
unsigned int mem_unit; /* Memory unit size in bytes */
|
|
|
|
char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
|
|
|
|
};
|
|
|
|
|
2005-10-30 16:03:10 -07:00
|
|
|
/* Force a compilation error if condition is true */
|
2005-09-13 02:25:13 -06:00
|
|
|
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-06-26 05:57:28 -06:00
|
|
|
/* Force a compilation error if condition is true, but also produce a
|
|
|
|
result (of value 0 and type size_t), so the expression can be used
|
|
|
|
e.g. in a structure initializer (or where-ever else comma expressions
|
|
|
|
aren't permitted). */
|
|
|
|
#define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Trap pasters of __FUNCTION__ at compile-time */
|
|
|
|
#define __FUNCTION__ (__func__)
|
|
|
|
|
2006-09-27 02:50:06 -06:00
|
|
|
/* This helps us to avoid #ifdef CONFIG_NUMA */
|
|
|
|
#ifdef CONFIG_NUMA
|
|
|
|
#define NUMA_BUILD 1
|
|
|
|
#else
|
|
|
|
#define NUMA_BUILD 0
|
|
|
|
#endif
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|