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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2008-07-25 02:45:24 -06:00
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#include <linux/typecheck.h>
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2009-02-05 09:51:38 -07:00
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#include <linux/dynamic_debug.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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2009-01-06 15:40:51 -07:00
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#define DIV_ROUND_CLOSEST(x, divisor)( \
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{ \
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typeof(divisor) __divisor = divisor; \
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(((x) + ((__divisor) / 2)) / (__divisor)); \
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} \
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)
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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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2009-06-19 00:08:50 -06:00
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#ifdef CONFIG_LBDAF
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2007-10-12 04:40:38 -06:00
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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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2008-07-29 23:33:42 -06:00
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/**
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* lower_32_bits - return bits 0-31 of a number
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* @n: the number we're accessing
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*/
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#define lower_32_bits(n) ((u32)(n))
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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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2009-06-16 12:02:28 -06:00
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/* Use the default kernel loglevel */
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#define KERN_DEFAULT "<d>"
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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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2009-06-16 11:57:02 -06:00
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#define KERN_CONT "<c>"
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2007-10-17 00:30:29 -06:00
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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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2008-08-12 16:08:59 -06:00
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#ifdef CONFIG_PREEMPT_VOLUNTARY
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extern int _cond_resched(void);
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# define might_resched() _cond_resched()
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#else
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# define might_resched() do { } while (0)
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#endif
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2008-10-29 15:01:15 -06:00
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#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
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2009-07-16 07:44:29 -06:00
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void __might_sleep(char *file, int line, int preempt_offset);
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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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# define might_sleep() \
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2009-07-16 07:44:29 -06:00
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do { __might_sleep(__FILE__, __LINE__, 0); 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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2009-07-16 07:44:29 -06:00
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static inline void __might_sleep(char *file, int line, int preempt_offset) { }
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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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2009-09-22 17:44:03 -06:00
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long __x = (x); \
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2005-04-16 16:20:36 -06:00
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(__x < 0) ? -__x : __x; \
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})
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2008-09-10 05:37:17 -06:00
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#ifdef CONFIG_PROVE_LOCKING
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void might_fault(void);
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#else
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static inline void might_fault(void)
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{
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might_sleep();
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}
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#endif
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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
|
|
|
extern int strict_strtoul(const char *, unsigned int, unsigned long *);
|
|
|
|
extern int strict_strtol(const char *, unsigned int, long *);
|
|
|
|
extern int strict_strtoull(const char *, unsigned int, unsigned long long *);
|
|
|
|
extern int strict_strtoll(const char *, unsigned int, long long *);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int sprintf(char * buf, const char * fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 2, 3)));
|
|
|
|
extern int vsprintf(char *buf, const char *, va_list)
|
|
|
|
__attribute__ ((format (printf, 2, 0)));
|
|
|
|
extern int snprintf(char * buf, size_t size, const char * fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
|
|
extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
|
|
|
__attribute__ ((format (printf, 3, 0)));
|
|
|
|
extern int scnprintf(char * buf, size_t size, const char * fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
|
|
extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
|
|
|
__attribute__ ((format (printf, 3, 0)));
|
2006-06-25 06:49:17 -06:00
|
|
|
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);
|
2008-07-24 17:27:46 -06:00
|
|
|
extern unsigned long long memparse(const char *ptr, char **retptr);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
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);
|
2008-08-15 16:29:38 -06:00
|
|
|
extern int func_ptr_is_kernel_text(void *ptr);
|
|
|
|
|
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
|
|
|
|
Introduce FW_BUG, FW_WARN and FW_INFO to consistenly tell users about BIOS bugs
The idea is to add this to printk after the severity:
printk(KERN_ERR FW_BUG "This is not our fault, BIOS developer: fix it by
simply add ...\n");
If a Firmware issue should be hidden, because it is
work-arounded, but you still want to see something popping up e.g.
for info only:
printk(KERN_INFO FW_INFO "This is done stupid, we can handle it,
but it should better be avoided in future\n");
or on the Linuxfirmwarekit to tell vendors that they did something
stupid or wrong without bothering the user:
printk(KERN_INFO FW_BUG "This is done stupid, we can handle it,
but it should better be avoided in future\n");
Some use cases:
- If a user sees a [Firmware Bug] message in the kernel
he should first update the BIOS before wasting time with
debugging and submiting on old firmware code to mailing
lists.
- The linuxfirmwarekit (http://www.linuxfirmwarekit.org)
tries to detect firmware bugs. It currently is doing that
in userspace which results in:
- Huge test scripts that could be a one liner in the kernel
- A lot of BIOS bugs are already absorbed by the kernel
What do we need such a stupid linuxfirmwarekit for?
- Vendors: Can test their BIOSes for Linux compatibility.
There will be the time when vendors realize that the test utils
on Linux are more strict and using them increases the qualitity
and stability of their products.
- Vendors: Can easily fix up their BIOSes and be more Linux
compatible by:
dmesg |grep "Firmware Bug"
and send the result to their BIOS developer colleagues who should
know what the messages are about and how to fix them, without
the need of studying kernel code.
- Distributions: can do a first automated HW/BIOS checks.
This can then be done without the need of asking kernel developers
who need to dig down the code and explain the details.
Certification can/will just be rejected until
dmesg |grep "Firmware Bug" is empty.
- Thus this can be used as an instrument to enforce cleaner BIOS
code. Currently every stupid Windows ACPI bug is
re-implemented in Linux which is a rather unfortunate situation.
We already have the power to avoid this in e.g. memory
or cpu hot-plug ACPI implementations, because Linux certification
is a must for most vendors in the server area.
Working towards being able to do that in the laptop area
(vendors are starting to look at Linux here also and will use this tool)
is the goal. At least provide them a tool to make it as easy
for this guys (e.g. not needing to browse kernel code) as possible.
- The ordinary Linux user: can go into the next shop, boots the
firmwarekit on his most preferred machines. He chooses one without
BIOS bugs. Unsupported HW is ok, he likes to try out latest projects
which might support them or likes to dig on it on his own, but he
hates to workaround broken BIOSes like hell.
I double checked with the firmwarekit.
There they have:
So the mapping generally is (also depending on how likely the BIOS is
to blame, this could sometimes be difficult):
FW_INFO = INFO
FW_WARN = WARN
FW_BUG = FAIL
For more info about the linuxfirmwarekit and why this is needed
can be found here:
http://www.linuxfirmwarekit.org
While severity matches with the firmwarekit, it might be tricky
to hide messages from the user.
E.g. we recently found out that on HP BIOSes negative temperatures
are returned, which seem to indicate that the thermal zone is
invalid.
We can work around that gracefully by ignoring the thermal zone
and we do not want to bother the ordinary user with a frightening
message: Firmware Bug: thermal management absolutely broken
but want to hide it from the user.
But in the linuxfirmwarekit this should be shown as a real
show stopper (the temperatures could really be wrong,
broken thermal management is one of the worst things
that can happen and the BIOS guys of the machine must
implement this properly).
It is intended to do that (hide it from the user with
KERN_INFO msg, but still print it as a BIOS bug) by:
printk(KERN_INFO FW_BUG "Negativ temperature values detected.
Try to workarounded, BIOS must get fixed\n");
Hope that works out..., no idea how to better hide it
as printk is the only way to easily provide this functionality.
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-09-01 06:27:02 -06:00
|
|
|
/*
|
|
|
|
* FW_BUG
|
|
|
|
* Add this to a message where you are sure the firmware is buggy or behaves
|
|
|
|
* really stupid or out of spec. Be aware that the responsible BIOS developer
|
|
|
|
* should be able to fix this issue or at least get a concrete idea of the
|
|
|
|
* problem by reading your message without the need of looking at the kernel
|
|
|
|
* code.
|
|
|
|
*
|
|
|
|
* Use it for definite and high priority BIOS bugs.
|
|
|
|
*
|
|
|
|
* FW_WARN
|
|
|
|
* Use it for not that clear (e.g. could the kernel messed up things already?)
|
|
|
|
* and medium priority BIOS bugs.
|
|
|
|
*
|
|
|
|
* FW_INFO
|
|
|
|
* Use this one if you want to tell the user or vendor about something
|
|
|
|
* suspicious, but generally harmless related to the firmware.
|
|
|
|
*
|
|
|
|
* Use it for information or very low priority BIOS bugs.
|
|
|
|
*/
|
|
|
|
#define FW_BUG "[Firmware Bug]: "
|
|
|
|
#define FW_WARN "[Firmware Warn]: "
|
|
|
|
#define FW_INFO "[Firmware Info]: "
|
|
|
|
|
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
|
|
|
|
2009-10-23 06:58:11 -06:00
|
|
|
extern int __printk_ratelimit(const char *func);
|
|
|
|
#define printk_ratelimit() __printk_ratelimit(__func__)
|
2008-02-08 05:21:25 -07:00
|
|
|
extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
|
|
|
|
unsigned int interval_msec);
|
2009-02-05 05:45:43 -07:00
|
|
|
|
2009-09-22 17:43:33 -06:00
|
|
|
extern int printk_delay_msec;
|
|
|
|
|
2009-02-05 05:45:43 -07:00
|
|
|
/*
|
|
|
|
* Print a one-time message (analogous to WARN_ONCE() et al):
|
|
|
|
*/
|
|
|
|
#define printk_once(x...) ({ \
|
2009-09-22 17:43:46 -06:00
|
|
|
static bool __print_once = true; \
|
2009-02-05 05:45:43 -07:00
|
|
|
\
|
|
|
|
if (__print_once) { \
|
2009-09-22 17:43:46 -06:00
|
|
|
__print_once = false; \
|
2009-02-05 05:45:43 -07:00
|
|
|
printk(x); \
|
|
|
|
} \
|
|
|
|
})
|
|
|
|
|
2009-04-02 17:58:57 -06:00
|
|
|
void log_buf_kexec_setup(void);
|
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 bool printk_timed_ratelimit(unsigned long *caller_jiffies, \
|
|
|
|
unsigned int interval_msec) \
|
|
|
|
{ return false; }
|
2009-02-05 05:45:43 -07:00
|
|
|
|
|
|
|
/* No effect, but we still get type checking even in the !PRINTK case: */
|
|
|
|
#define printk_once(x...) printk(x)
|
|
|
|
|
2009-04-02 17:58:57 -06:00
|
|
|
static inline void log_buf_kexec_setup(void)
|
|
|
|
{
|
|
|
|
}
|
2005-05-01 09:59:02 -06:00
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-08-11 06:38:12 -06:00
|
|
|
extern int printk_needs_cpu(int cpu);
|
|
|
|
extern void printk_tick(void);
|
|
|
|
|
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;
|
2009-06-24 15:32:11 -06:00
|
|
|
extern int panic_on_io_nmi;
|
2005-04-16 16:20:36 -06:00
|
|
|
extern const char *print_tainted(void);
|
2008-10-15 23:01:41 -06:00
|
|
|
extern void add_taint(unsigned flag);
|
|
|
|
extern int test_taint(unsigned flag);
|
|
|
|
extern unsigned long get_taint(void);
|
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;
|
|
|
|
|
2008-10-15 23:01:41 -06:00
|
|
|
#define TAINT_PROPRIETARY_MODULE 0
|
|
|
|
#define TAINT_FORCED_MODULE 1
|
|
|
|
#define TAINT_UNSAFE_SMP 2
|
|
|
|
#define TAINT_FORCED_RMMOD 3
|
|
|
|
#define TAINT_MACHINE_CHECK 4
|
|
|
|
#define TAINT_BAD_PAGE 5
|
|
|
|
#define TAINT_USER 6
|
|
|
|
#define TAINT_DIE 7
|
|
|
|
#define TAINT_OVERRIDDEN_ACPI_TABLE 8
|
|
|
|
#define TAINT_WARN 9
|
2008-10-17 10:50:12 -06:00
|
|
|
#define TAINT_CRAP 10
|
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
|
|
|
|
2008-11-12 13:16:43 -07:00
|
|
|
#ifndef pr_fmt
|
|
|
|
#define pr_fmt(fmt) fmt
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#define pr_emerg(fmt, ...) \
|
|
|
|
printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
|
|
|
|
#define pr_alert(fmt, ...) \
|
|
|
|
printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
|
|
|
|
#define pr_crit(fmt, ...) \
|
|
|
|
printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
|
|
|
|
#define pr_err(fmt, ...) \
|
|
|
|
printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
|
|
|
|
#define pr_warning(fmt, ...) \
|
|
|
|
printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
|
|
|
|
#define pr_notice(fmt, ...) \
|
|
|
|
printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
|
|
|
|
#define pr_info(fmt, ...) \
|
|
|
|
printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
|
2009-03-31 16:23:51 -06:00
|
|
|
#define pr_cont(fmt, ...) \
|
|
|
|
printk(KERN_CONT fmt, ##__VA_ARGS__)
|
2007-10-17 00:29:48 -06:00
|
|
|
|
2009-04-09 15:48:24 -06:00
|
|
|
/* pr_devel() should produce zero code unless DEBUG is defined */
|
|
|
|
#ifdef DEBUG
|
|
|
|
#define pr_devel(fmt, ...) \
|
|
|
|
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
|
|
|
|
#else
|
|
|
|
#define pr_devel(fmt, ...) \
|
|
|
|
({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; })
|
|
|
|
#endif
|
|
|
|
|
2006-08-07 17:37:15 -06:00
|
|
|
/* If you are writing a driver, please use dev_dbg instead */
|
2008-12-04 08:55:47 -07:00
|
|
|
#if defined(DEBUG)
|
|
|
|
#define pr_debug(fmt, ...) \
|
|
|
|
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
|
2009-02-05 09:51:38 -07:00
|
|
|
#elif defined(CONFIG_DYNAMIC_DEBUG)
|
2009-03-11 04:07:28 -06:00
|
|
|
/* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
|
driver core: basic infrastructure for per-module dynamic debug messages
Base infrastructure to enable per-module debug messages.
I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes
control of debugging statements on a per-module basis in one /proc file,
currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG,
is not set, debugging statements can still be enabled as before, often by
defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no
affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set.
The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That
is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls
can be dynamically enabled/disabled on a per-module basis.
Future plans include extending this functionality to subsystems, that define
their own debug levels and flags.
Usage:
Dynamic debugging is controlled by the debugfs file,
<debugfs>/dynamic_printk/modules. This file contains a list of the modules that
can be enabled. The format of the file is as follows:
<module_name> <enabled=0/1>
.
.
.
<module_name> : Name of the module in which the debug call resides
<enabled=0/1> : whether the messages are enabled or not
For example:
snd_hda_intel enabled=0
fixup enabled=1
driver enabled=0
Enable a module:
$echo "set enabled=1 <module_name>" > dynamic_printk/modules
Disable a module:
$echo "set enabled=0 <module_name>" > dynamic_printk/modules
Enable all modules:
$echo "set enabled=1 all" > dynamic_printk/modules
Disable all modules:
$echo "set enabled=0 all" > dynamic_printk/modules
Finally, passing "dynamic_printk" at the command line enables
debugging for all modules. This mode can be turned off via the above
disable command.
[gkh: minor cleanups and tweaks to make the build work quietly]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-12 14:46:19 -06:00
|
|
|
#define pr_debug(fmt, ...) do { \
|
2009-03-11 04:07:28 -06:00
|
|
|
dynamic_pr_debug(fmt, ##__VA_ARGS__); \
|
driver core: basic infrastructure for per-module dynamic debug messages
Base infrastructure to enable per-module debug messages.
I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes
control of debugging statements on a per-module basis in one /proc file,
currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG,
is not set, debugging statements can still be enabled as before, often by
defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no
affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set.
The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That
is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls
can be dynamically enabled/disabled on a per-module basis.
Future plans include extending this functionality to subsystems, that define
their own debug levels and flags.
Usage:
Dynamic debugging is controlled by the debugfs file,
<debugfs>/dynamic_printk/modules. This file contains a list of the modules that
can be enabled. The format of the file is as follows:
<module_name> <enabled=0/1>
.
.
.
<module_name> : Name of the module in which the debug call resides
<enabled=0/1> : whether the messages are enabled or not
For example:
snd_hda_intel enabled=0
fixup enabled=1
driver enabled=0
Enable a module:
$echo "set enabled=1 <module_name>" > dynamic_printk/modules
Disable a module:
$echo "set enabled=0 <module_name>" > dynamic_printk/modules
Enable all modules:
$echo "set enabled=1 all" > dynamic_printk/modules
Disable all modules:
$echo "set enabled=0 all" > dynamic_printk/modules
Finally, passing "dynamic_printk" at the command line enables
debugging for all modules. This mode can be turned off via the above
disable command.
[gkh: minor cleanups and tweaks to make the build work quietly]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-12 14:46:19 -06:00
|
|
|
} while (0)
|
2005-04-16 16:20:36 -06:00
|
|
|
#else
|
2008-11-12 13:16:43 -07:00
|
|
|
#define pr_debug(fmt, ...) \
|
|
|
|
({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; })
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|
|
|
|
|
2009-03-05 02:28:45 -07:00
|
|
|
/*
|
|
|
|
* General tracing related utility functions - trace_printk(),
|
2009-03-05 08:35:56 -07:00
|
|
|
* tracing_on/tracing_off and tracing_start()/tracing_stop
|
|
|
|
*
|
|
|
|
* Use tracing_on/tracing_off when you want to quickly turn on or off
|
|
|
|
* tracing. It simply enables or disables the recording of the trace events.
|
2009-06-02 00:01:37 -06:00
|
|
|
* This also corresponds to the user space /sys/kernel/debug/tracing/tracing_on
|
2009-03-05 08:35:56 -07:00
|
|
|
* file, which gives a means for the kernel and userspace to interact.
|
|
|
|
* Place a tracing_off() in the kernel where you want tracing to end.
|
|
|
|
* From user space, examine the trace, and then echo 1 > tracing_on
|
|
|
|
* to continue tracing.
|
|
|
|
*
|
|
|
|
* tracing_stop/tracing_start has slightly more overhead. It is used
|
|
|
|
* by things like suspend to ram where disabling the recording of the
|
|
|
|
* trace is not enough, but tracing must actually stop because things
|
|
|
|
* like calling smp_processor_id() may crash the system.
|
|
|
|
*
|
|
|
|
* Most likely, you want to use tracing_on/tracing_off.
|
2009-03-05 02:28:45 -07:00
|
|
|
*/
|
2009-03-05 08:35:56 -07:00
|
|
|
#ifdef CONFIG_RING_BUFFER
|
|
|
|
void tracing_on(void);
|
|
|
|
void tracing_off(void);
|
|
|
|
/* trace_off_permanent stops recording with no way to bring it back */
|
|
|
|
void tracing_off_permanent(void);
|
|
|
|
int tracing_is_on(void);
|
|
|
|
#else
|
|
|
|
static inline void tracing_on(void) { }
|
|
|
|
static inline void tracing_off(void) { }
|
|
|
|
static inline void tracing_off_permanent(void) { }
|
|
|
|
static inline int tracing_is_on(void) { return 0; }
|
|
|
|
#endif
|
2009-03-05 02:28:45 -07:00
|
|
|
#ifdef CONFIG_TRACING
|
|
|
|
extern void tracing_start(void);
|
|
|
|
extern void tracing_stop(void);
|
|
|
|
extern void ftrace_off_permanent(void);
|
|
|
|
|
|
|
|
extern void
|
|
|
|
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
|
|
|
|
|
2009-03-06 09:21:49 -07:00
|
|
|
static inline void __attribute__ ((format (printf, 1, 2)))
|
|
|
|
____trace_printk_check_format(const char *fmt, ...)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
#define __trace_printk_check_format(fmt, args...) \
|
|
|
|
do { \
|
|
|
|
if (0) \
|
|
|
|
____trace_printk_check_format(fmt, ##args); \
|
|
|
|
} while (0)
|
|
|
|
|
2009-03-05 02:28:45 -07:00
|
|
|
/**
|
|
|
|
* trace_printk - printf formatting in the ftrace buffer
|
|
|
|
* @fmt: the printf format for printing
|
|
|
|
*
|
|
|
|
* Note: __trace_printk is an internal function for trace_printk and
|
|
|
|
* the @ip is passed in via the trace_printk macro.
|
|
|
|
*
|
|
|
|
* This function allows a kernel developer to debug fast path sections
|
|
|
|
* that printk is not appropriate for. By scattering in various
|
|
|
|
* printk like tracing in the code, a developer can quickly see
|
|
|
|
* where problems are occurring.
|
|
|
|
*
|
|
|
|
* This is intended as a debugging tool for the developer only.
|
|
|
|
* Please refrain from leaving trace_printks scattered around in
|
|
|
|
* your code.
|
|
|
|
*/
|
2009-03-06 09:21:49 -07:00
|
|
|
|
|
|
|
#define trace_printk(fmt, args...) \
|
|
|
|
do { \
|
|
|
|
__trace_printk_check_format(fmt, ##args); \
|
2009-03-12 11:24:49 -06:00
|
|
|
if (__builtin_constant_p(fmt)) { \
|
|
|
|
static const char *trace_printk_fmt \
|
|
|
|
__attribute__((section("__trace_printk_fmt"))) = \
|
|
|
|
__builtin_constant_p(fmt) ? fmt : NULL; \
|
|
|
|
\
|
|
|
|
__trace_bprintk(_THIS_IP_, trace_printk_fmt, ##args); \
|
|
|
|
} else \
|
|
|
|
__trace_printk(_THIS_IP_, fmt, ##args); \
|
2009-03-06 09:21:49 -07:00
|
|
|
} while (0)
|
|
|
|
|
2009-03-12 11:24:49 -06:00
|
|
|
extern int
|
|
|
|
__trace_bprintk(unsigned long ip, const char *fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 2, 3)));
|
|
|
|
|
2009-03-05 02:28:45 -07:00
|
|
|
extern int
|
|
|
|
__trace_printk(unsigned long ip, const char *fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 2, 3)));
|
2009-03-06 09:21:49 -07:00
|
|
|
|
2009-03-12 11:24:49 -06:00
|
|
|
/*
|
|
|
|
* The double __builtin_constant_p is because gcc will give us an error
|
|
|
|
* if we try to allocate the static variable to fmt if it is not a
|
|
|
|
* constant. Even with the outer if statement.
|
|
|
|
*/
|
2009-03-06 09:21:49 -07:00
|
|
|
#define ftrace_vprintk(fmt, vargs) \
|
|
|
|
do { \
|
2009-03-12 11:24:49 -06:00
|
|
|
if (__builtin_constant_p(fmt)) { \
|
|
|
|
static const char *trace_printk_fmt \
|
|
|
|
__attribute__((section("__trace_printk_fmt"))) = \
|
|
|
|
__builtin_constant_p(fmt) ? fmt : NULL; \
|
2009-03-09 03:11:36 -06:00
|
|
|
\
|
2009-03-12 11:24:49 -06:00
|
|
|
__ftrace_vbprintk(_THIS_IP_, trace_printk_fmt, vargs); \
|
|
|
|
} else \
|
|
|
|
__ftrace_vprintk(_THIS_IP_, fmt, vargs); \
|
2009-03-06 09:21:49 -07:00
|
|
|
} while (0)
|
|
|
|
|
2009-03-12 11:24:49 -06:00
|
|
|
extern int
|
|
|
|
__ftrace_vbprintk(unsigned long ip, const char *fmt, va_list ap);
|
|
|
|
|
2009-03-05 02:28:45 -07:00
|
|
|
extern int
|
|
|
|
__ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);
|
2009-03-06 09:21:49 -07:00
|
|
|
|
2009-03-05 02:28:45 -07:00
|
|
|
extern void ftrace_dump(void);
|
|
|
|
#else
|
|
|
|
static inline void
|
|
|
|
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
|
|
|
|
static inline int
|
|
|
|
trace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
|
|
|
|
|
|
|
|
static inline void tracing_start(void) { }
|
|
|
|
static inline void tracing_stop(void) { }
|
|
|
|
static inline void ftrace_off_permanent(void) { }
|
|
|
|
static inline int
|
|
|
|
trace_printk(const char *fmt, ...)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static inline int
|
|
|
|
ftrace_vprintk(const char *fmt, va_list ap)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static inline void ftrace_dump(void) { }
|
2009-03-06 09:21:49 -07:00
|
|
|
#endif /* CONFIG_TRACING */
|
2009-03-05 02:28:45 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* 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
|
|
|
|
|
|
|
/*
|
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
|
|
|
|
2009-01-07 19:09:12 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* swap - swap value of @a and @b
|
|
|
|
*/
|
2009-02-04 16:11:59 -07:00
|
|
|
#define swap(a, b) \
|
|
|
|
do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
|
2009-01-07 19:09:12 -07:00
|
|
|
|
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) );})
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-02-10 02:46:00 -07:00
|
|
|
struct sysinfo;
|
|
|
|
extern int do_sysinfo(struct sysinfo *info);
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
|
2009-09-21 08:37:12 -06:00
|
|
|
#ifndef __EXPORTED_HEADERS__
|
|
|
|
#ifndef __KERNEL__
|
|
|
|
#warning Attempt to use kernel headers from user space, see http://kernelnewbies.org/KernelHeaders
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __EXPORTED_HEADERS__ */
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
#define SI_LOAD_SHIFT 16
|
|
|
|
struct sysinfo {
|
|
|
|
long uptime; /* Seconds since boot */
|
|
|
|
unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
|
|
|
|
unsigned long totalram; /* Total usable main memory size */
|
|
|
|
unsigned long freeram; /* Available memory size */
|
|
|
|
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.. */
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};
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2005-10-30 16:03:10 -07:00
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/* Force a compilation error if condition is true */
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2009-09-22 17:43:52 -06:00
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#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))
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/* Force a compilation error if condition is constant and true */
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#define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))
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2005-04-16 16:20:36 -06:00
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2006-06-26 05:57:28 -06:00
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/* Force a compilation error if condition is true, but also produce a
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result (of value 0 and type size_t), so the expression can be used
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e.g. in a structure initializer (or where-ever else comma expressions
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aren't permitted). */
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2009-09-22 17:43:52 -06:00
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#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
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#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
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2006-06-26 05:57:28 -06:00
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2005-04-16 16:20:36 -06:00
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/* Trap pasters of __FUNCTION__ at compile-time */
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#define __FUNCTION__ (__func__)
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2006-09-27 02:50:06 -06:00
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/* This helps us to avoid #ifdef CONFIG_NUMA */
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#ifdef CONFIG_NUMA
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#define NUMA_BUILD 1
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#else
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#define NUMA_BUILD 0
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#endif
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2008-08-14 13:45:10 -06:00
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/* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
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#ifdef CONFIG_FTRACE_MCOUNT_RECORD
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# define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
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#endif
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2005-04-16 16:20:36 -06:00
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#endif
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