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Commit 3b96a56d authored by Mathieu Desnoyers's avatar Mathieu Desnoyers Committed by Linus Torvalds
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Add cmpxchg64 and cmpxchg64_local to mips 



Make sure that at least cmpxchg64_local is available on all architectures to use
for unsigned long long values.

Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a259b242

include/asm-mips/cmpxchg.h

+17 −0
Original line number Diff line number Diff line
@@ -104,4 +104,21 @@ extern void __cmpxchg_called_with_bad_pointer(void); 
#define cmpxchg(ptr, old, new)		__cmpxchg(ptr, old, new, smp_llsc_mb())

#define cmpxchg_local(ptr, old, new)	__cmpxchg(ptr, old, new, )



#define cmpxchg64(ptr, o, n)						\

  ({									\

	BUILD_BUG_ON(sizeof(*(ptr)) != 8);				\

	cmpxchg((ptr), (o), (n));					\

  })



#ifdef CONFIG_64BIT

#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



#endif /* __ASM_CMPXCHG_H */