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Add cmpxchg64 and cmpxchg64_local to powerpc

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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>
Acked-by: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mathieu Desnoyers 2008-02-07 00:16:10 -08:00 committed by Linus Torvalds
parent 3b96a56d39
commit f9c4650bcf
1 changed files with 16 additions and 2 deletions
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18
include/asm-powerpc/system.h
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@ -463,7 +463,7 @@ __cmpxchg_local(volatile void *ptr, unsigned long old, unsigned long new,
return old;
}
#define cmpxchg(ptr,o,n) \
#define cmpxchg(ptr, o, n) \
({ \
__typeof__(*(ptr)) _o_ = (o); \
__typeof__(*(ptr)) _n_ = (n); \
@ -472,7 +472,7 @@ __cmpxchg_local(volatile void *ptr, unsigned long old, unsigned long new,
})
#define cmpxchg_local(ptr,o,n) \
#define cmpxchg_local(ptr, o, n) \
({ \
__typeof__(*(ptr)) _o_ = (o); \
__typeof__(*(ptr)) _n_ = (n); \
@ -492,6 +492,20 @@ __cmpxchg_local(volatile void *ptr, unsigned long old, unsigned long new,
*/
#define NET_IP_ALIGN 0
#define NET_SKB_PAD L1_CACHE_BYTES
#define cmpxchg64(ptr, o, n) \
({ \
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
cmpxchg((ptr), (o), (n)); \
})
#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
#define arch_align_stack(x) (x)