diff options
| author | Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2008-02-07 00:16:14 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:32 -0800 |
| commit | 14e0cb3c60b89c4a2512852ffc18601c72314a0f (patch) | |
| tree | 59267c487c31f18036ac8c1a28a2250c3bd97f60 | |
| parent | 7732ba3abc5a53e7e1d93afd5a5a6ccf74f2ce53 (diff) | |
Add cmpxchg_local to frv
Use the new generic cmpxchg_local (disables interrupt) for 8, 16 and 64 bits
arguments. Use the 32 bits cmpxchg available on the architecture for 32 bits
arguments.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/asm-frv/system.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-frv/system.h b/include/asm-frv/system.h index 9f5663ba19f..59be5443a68 100644 --- a/include/asm-frv/system.h +++ b/include/asm-frv/system.h @@ -268,5 +268,29 @@ extern uint32_t __cmpxchg_32(uint32_t *v, uint32_t test, uint32_t new); #endif +#include <asm-generic/cmpxchg-local.h> + +static inline unsigned long __cmpxchg_local(volatile void *ptr, + unsigned long old, + unsigned long new, int size) +{ + switch (size) { + case 4: + return cmpxchg(ptr, old, new); + default: + return __cmpxchg_local_generic(ptr, old, new, size); + } + + return old; +} + +/* + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make + * them available. + */ +#define cmpxchg_local(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \ + (unsigned long)(n), sizeof(*(ptr)))) +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) #endif /* _ASM_SYSTEM_H */ |