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author | Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2008-02-07 00:16:12 -0800 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:31 -0800 |
commit | 5e86c11d3eb4662000f3ced7344352b2ca319d03 (patch) | |
tree | 30332e5df3105622e2b5443aa346c739a89f37f6 /include/asm-avr32/system.h | |
parent | 176393d4232a89aaf8745b0726f4d212a20103f1 (diff) | |
download | linux-5e86c11d3eb4662000f3ced7344352b2ca319d03.tar.bz2 |
Add cmpxchg_local to avr32
Use the new generic cmpxchg_local (disables interrupt) for 8, 16 and 64 bits
cmpxchg_local. Use the __cmpxchg_u32 primitive for 32 bits cmpxchg_local.
Note that cmpxchg only uses the __cmpxchg_u32 or __cmpxchg_u64 and will cause
a linker error if called with 8 or 16 bits argument.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-avr32/system.h')
-rw-r--r-- | include/asm-avr32/system.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/asm-avr32/system.h b/include/asm-avr32/system.h index c600cc15cbcb..9702c2213e1e 100644 --- a/include/asm-avr32/system.h +++ b/include/asm-avr32/system.h @@ -145,6 +145,29 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, (unsigned long)(new), \ sizeof(*(ptr)))) +#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_u32(ptr, old, new); + default: + return __cmpxchg_local_generic(ptr, old, new, size); + } + + return old; +} + +#define cmpxchg_local(ptr, old, new) \ + ((typeof(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(old), \ + (unsigned long)(new), \ + sizeof(*(ptr)))) + +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) + struct pt_regs; void NORET_TYPE die(const char *str, struct pt_regs *regs, long err); void _exception(long signr, struct pt_regs *regs, int code, |