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| author | David Woodhouse <David.Woodhouse@intel.com> | 2008-09-01 12:32:13 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2008-09-01 12:32:13 +0200 |
| commit | 9d7548d4ca3c52ecb58f098a32b0756cdf8f96ee (patch) | |
| tree | 651f7058bbaa2d8b2855286380d614afcf505118 /arch/alpha/include/asm/barrier.h | |
| parent | [JFFS2] Move JFFS2 config options out of fs/Kconfig (diff) | |
| parent | Resource handling: add 'insert_resource_expand_to_fit()' function (diff) | |
| download | linux-9d7548d4ca3c52ecb58f098a32b0756cdf8f96ee.tar.xz linux-9d7548d4ca3c52ecb58f098a32b0756cdf8f96ee.zip | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/alpha/include/asm/barrier.h')
| -rw-r--r-- | arch/alpha/include/asm/barrier.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/barrier.h b/arch/alpha/include/asm/barrier.h new file mode 100644 index 000000000000..ac78eba909bc --- /dev/null +++ b/arch/alpha/include/asm/barrier.h @@ -0,0 +1,33 @@ +#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() do { } while (0) +#endif + +#define set_mb(var, value) \ +do { var = value; mb(); } while (0) + +#endif /* __BARRIER_H */ |