diff options
| author |   Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2008-02-07 00:16:09 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:30 -0800 |
| commit | 3b96a56d395a4dcf4c05c48d8f4e74b1f8bd073d (patch) | |
| tree | 1c4e8cb7c5ea7e7af7dd8e4c07b429dffa4b9cc5 /include/asm-mips | |
| parent | Add cmpxchg64 and cmpxchg64_local to alpha (diff) | |
| download | linux-dev-3b96a56d395a4dcf4c05c48d8f4e74b1f8bd073d.tar.xz linux-dev-3b96a56d395a4dcf4c05c48d8f4e74b1f8bd073d.zip | |
Add cmpxchg64 and cmpxchg64_local to mips
Make sure that at least cmpxchg64_local is available on all architectures to use
for unsigned long long values.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-mips')
| -rw-r--r-- | include/asm-mips/cmpxchg.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/asm-mips/cmpxchg.h b/include/asm-mips/cmpxchg.h index a5ec0e5dc5b8..4a812c3ceb90 100644 --- a/include/asm-mips/cmpxchg.h +++ b/include/asm-mips/cmpxchg.h @@ -104,4 +104,21 @@ extern void __cmpxchg_called_with_bad_pointer(void); #define cmpxchg(ptr, old, new) __cmpxchg(ptr, old, new, smp_llsc_mb()) #define cmpxchg_local(ptr, old, new) __cmpxchg(ptr, old, new, ) +#define cmpxchg64(ptr, o, n) \ + ({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg((ptr), (o), (n)); \ + }) + +#ifdef CONFIG_64BIT +#define cmpxchg64_local(ptr, o, n) \ + ({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg_local((ptr), (o), (n)); \ + }) +#else +#include <asm-generic/cmpxchg-local.h> +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) +#endif + #endif /* __ASM_CMPXCHG_H */ |