diff options
| author |   Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2008-02-07 00:16:20 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:32 -0800 |
| commit | 5da751035c5c8f5b30978e97fd4b3c75f453b04e (patch) | |
| tree | 9d50b1187702079ba6fb5d61a84db4dbdd646937 /include | |
| parent | local_t m32r use architecture specific cmpxchg_local (diff) | |
| download | linux-dev-5da751035c5c8f5b30978e97fd4b3c75f453b04e.tar.xz linux-dev-5da751035c5c8f5b30978e97fd4b3c75f453b04e.zip | |
Add cmpxchg_local to m86k
Use the new generic cmpxchg_local (disables interrupt). Also use the generic
cmpxchg as fallback if SMP is not set.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
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-m68k/system.h | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/include/asm-m68k/system.h b/include/asm-m68k/system.h index caa9b1663e45..dbb6515ffd5b 100644 --- a/include/asm-m68k/system.h +++ b/include/asm-m68k/system.h @@ -154,6 +154,10 @@ static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int siz } #endif +#include <asm-generic/cmpxchg-local.h> + +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) + /* * Atomic compare and exchange. Compare OLD with MEM, if identical, * store NEW in MEM. Return the initial value in MEM. Success is @@ -185,9 +189,26 @@ static inline unsigned long __cmpxchg(volatile void *p, unsigned long old, return old; } -#define cmpxchg(ptr,o,n)\ - ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\ - (unsigned long)(n),sizeof(*(ptr)))) +#define cmpxchg(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o), \ + (unsigned long)(n), sizeof(*(ptr)))) +#define cmpxchg_local(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o), \ + (unsigned long)(n), sizeof(*(ptr)))) +#else + +/* + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make + * them available. + */ +#define cmpxchg_local(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ + (unsigned long)(n), sizeof(*(ptr)))) + +#ifndef CONFIG_SMP +#include <asm-generic/cmpxchg.h> +#endif + #endif #define arch_align_stack(x) (x) |