mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 01:51:53 +00:00
8c7c7c9bf3
In most cases the return value of WARN_ON() is ignored. If the generic
definition for the !CONFIG_BUG case is used this will result in a warning:
CC kernel/sched.o
In file included from include/linux/bio.h:25,
from include/linux/blkdev.h:14,
from kernel/sched.c:39:
include/linux/ioprio.h: In function âtask_ioprioâ:
include/linux/ioprio.h:50: warning: statement with no effect
kernel/sched.c: In function âcontext_switchâ:
kernel/sched.c:1834: warning: statement with no effect
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
#ifndef _ASM_GENERIC_BUG_H
|
|
#define _ASM_GENERIC_BUG_H
|
|
|
|
#include <linux/compiler.h>
|
|
|
|
#ifdef CONFIG_BUG
|
|
#ifndef HAVE_ARCH_BUG
|
|
#define BUG() do { \
|
|
printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __FUNCTION__); \
|
|
panic("BUG!"); \
|
|
} while (0)
|
|
#endif
|
|
|
|
#ifndef HAVE_ARCH_BUG_ON
|
|
#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
|
|
#endif
|
|
|
|
#ifndef HAVE_ARCH_WARN_ON
|
|
#define WARN_ON(condition) ({ \
|
|
typeof(condition) __ret_warn_on = (condition); \
|
|
if (unlikely(__ret_warn_on)) { \
|
|
printk("BUG: warning at %s:%d/%s()\n", __FILE__, \
|
|
__LINE__, __FUNCTION__); \
|
|
dump_stack(); \
|
|
} \
|
|
unlikely(__ret_warn_on); \
|
|
})
|
|
#endif
|
|
|
|
#else /* !CONFIG_BUG */
|
|
#ifndef HAVE_ARCH_BUG
|
|
#define BUG()
|
|
#endif
|
|
|
|
#ifndef HAVE_ARCH_BUG_ON
|
|
#define BUG_ON(condition) do { if (condition) ; } while(0)
|
|
#endif
|
|
|
|
#ifndef HAVE_ARCH_WARN_ON
|
|
#define WARN_ON(condition) ({ \
|
|
typeof(condition) __ret_warn_on = (condition); \
|
|
unlikely(__ret_warn_on); \
|
|
})
|
|
#endif
|
|
#endif
|
|
|
|
#define WARN_ON_ONCE(condition) ({ \
|
|
static int __warned; \
|
|
typeof(condition) __ret_warn_once = (condition); \
|
|
\
|
|
if (unlikely(__ret_warn_once)) \
|
|
if (WARN_ON(!__warned)) \
|
|
__warned = 1; \
|
|
unlikely(__ret_warn_once); \
|
|
})
|
|
|
|
#ifdef CONFIG_SMP
|
|
# define WARN_ON_SMP(x) WARN_ON(x)
|
|
#else
|
|
# define WARN_ON_SMP(x) do { } while (0)
|
|
#endif
|
|
|
|
#endif
|