diff options
| author | Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2008-02-07 09:16:08 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 17:42:30 +0100 |
| commit | a259b2428b10c19b94e346bc69d5b3bf9bff488e (patch) | |
| tree | ceb0536890fc85e46b905239ffe44077be695b03 /include | |
| parent | Add cmpxchg_local to asm-generic for per cpu atomic operations (diff) | |
| download | linux-a259b2428b10c19b94e346bc69d5b3bf9bff488e.tar.xz linux-a259b2428b10c19b94e346bc69d5b3bf9bff488e.zip | |
Add cmpxchg64 and cmpxchg64_local to alpha
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: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-alpha/system.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/include/asm-alpha/system.h b/include/asm-alpha/system.h index fd9dc889f36c..ed221d6408fc 100644 --- a/include/asm-alpha/system.h +++ b/include/asm-alpha/system.h @@ -681,13 +681,18 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) return old; } -#define cmpxchg(ptr,o,n) \ +#define cmpxchg(ptr, o, n) \ ({ \ __typeof__(*(ptr)) _o_ = (o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr))); \ }) +#define cmpxchg64(ptr, o, n) \ + ({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg((ptr), (o), (n)); \ + }) static inline unsigned long __cmpxchg_u8_local(volatile char *m, long old, long new) @@ -803,13 +808,19 @@ __cmpxchg_local(volatile void *ptr, unsigned long old, unsigned long new, return old; } -#define cmpxchg_local(ptr,o,n) \ +#define cmpxchg_local(ptr, o, n) \ ({ \ __typeof__(*(ptr)) _o_ = (o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr))); \ }) +#define cmpxchg64_local(ptr, o, n) \ + ({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg_local((ptr), (o), (n)); \ + }) + #endif /* __ASSEMBLY__ */ |