mirror of
https://github.com/torvalds/linux.git
synced 2024-12-04 10:01:41 +00:00
77b4cf5cb0
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Richard Henderson <rth@twiddle.net Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
36 lines
751 B
C
36 lines
751 B
C
#ifndef __BARRIER_H
|
|
#define __BARRIER_H
|
|
|
|
#include <asm/compiler.h>
|
|
|
|
#define mb() \
|
|
__asm__ __volatile__("mb": : :"memory")
|
|
|
|
#define rmb() \
|
|
__asm__ __volatile__("mb": : :"memory")
|
|
|
|
#define wmb() \
|
|
__asm__ __volatile__("wmb": : :"memory")
|
|
|
|
#define read_barrier_depends() \
|
|
__asm__ __volatile__("mb": : :"memory")
|
|
|
|
#ifdef CONFIG_SMP
|
|
#define __ASM_SMP_MB "\tmb\n"
|
|
#define smp_mb() mb()
|
|
#define smp_rmb() rmb()
|
|
#define smp_wmb() wmb()
|
|
#define smp_read_barrier_depends() read_barrier_depends()
|
|
#else
|
|
#define __ASM_SMP_MB
|
|
#define smp_mb() barrier()
|
|
#define smp_rmb() barrier()
|
|
#define smp_wmb() barrier()
|
|
#define smp_read_barrier_depends() do { } while (0)
|
|
#endif
|
|
|
|
#define set_mb(var, value) \
|
|
do { var = value; mb(); } while (0)
|
|
|
|
#endif /* __BARRIER_H */
|