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    Subject[patch 06/28] Add cmpxchg64 and cmpxchg64_local to x86_64
    Make sure that at least cmpxchg64_local is available on all architectures to use
    for unsigned long long values.

    Signed-off-by: Mathieu Desnoyers <>
    CC: Andi Kleen <>
    include/asm-x86_64/cmpxchg.h | 2 ++
    1 file changed, 2 insertions(+)

    Index: linux-2.6-lttng/include/asm-x86_64/cmpxchg.h
    --- linux-2.6-lttng.orig/include/asm-x86_64/cmpxchg.h 2007-08-27 11:16:46.000000000 -0400
    +++ linux-2.6-lttng/include/asm-x86_64/cmpxchg.h 2007-08-27 11:17:21.000000000 -0400
    @@ -127,8 +127,10 @@ static inline unsigned long __cmpxchg_lo
    #define cmpxchg(ptr,o,n)\
    ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
    (unsigned long)(n),sizeof(*(ptr))))
    +#define cmpxchg64 cmpxchg
    #define cmpxchg_local(ptr,o,n)\
    ((__typeof__(*(ptr)))__cmpxchg_local((ptr),(unsigned long)(o),\
    (unsigned long)(n),sizeof(*(ptr))))
    +#define cmpxchg64_local cmpxchg_local

    Mathieu Desnoyers
    Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
    OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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