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Diffstat (limited to 'include/asm-alpha/barrier.h')
| -rw-r--r-- | include/asm-alpha/barrier.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/asm-alpha/barrier.h b/include/asm-alpha/barrier.h new file mode 100644 index 000000000000..681ff581afa5 --- /dev/null +++ b/include/asm-alpha/barrier.h @@ -0,0 +1,36 @@ +#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 smp_mb() mb() +#define smp_rmb() rmb() +#define smp_wmb() wmb() +#define smp_read_barrier_depends() read_barrier_depends() +#else +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#define smp_read_barrier_depends() barrier() +#endif + +#define set_mb(var, value) \ +do { var = value; mb(); } while (0) + +#define set_wmb(var, value) \ +do { var = value; wmb(); } while (0) + +#endif /* __BARRIER_H */ |