diff options
| author | Andrew Morton <akpm@osdl.org> | 2005-10-25 08:05:58 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-25 18:32:46 +0200 |
| commit | 0db9ae4a79381a5a3d272ccb51851c48c4bcbb6d (patch) | |
| tree | 2799d939a04135e036eece1159771badac48e6e8 /include/asm-alpha/barrier.h | |
| parent | [PATCH] Return the line length via sysfs for fbdev (diff) | |
| download | linux-0db9ae4a79381a5a3d272ccb51851c48c4bcbb6d.tar.xz linux-0db9ae4a79381a5a3d272ccb51851c48c4bcbb6d.zip | |
[PATCH] alpha: atomic dependency fix
My alpha build is exploding because asm/atomic.h now needs smb_mb(), which is
over in the (not included) system.h.
I fear what will happen if I include system.h into atomic.h, so let's put the
barriers into their own header file.
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-alpha/barrier.h')
| -rw-r--r-- | include/asm-alpha/barrier.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/asm-alpha/barrier.h b/include/asm-alpha/barrier.h new file mode 100644 index 000000000000..229c83fe77cb --- /dev/null +++ b/include/asm-alpha/barrier.h @@ -0,0 +1,34 @@ +#ifndef __BARRIER_H +#define __BARRIER_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 */ |