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    Subject[patch 09/23] Add cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64 (revised)
    Add cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64 (revised)

    Add the primitives cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64. They
    use cmpxchg_acq as underlying macro, just like the already existing ia64
    cmpxchg().

    Changelog:

    ia64 cmpxchg_local coding style fix
    Quoting Keith Owens:

    As a matter of coding style, I prefer

    #define cmpxchg_local cmpxchg
    #define cmpxchg64_local cmpxchg64

    Which makes it absolutely clear that they are the same code. With your
    patch, humans have to do a string compare of two defines to see if they
    are the same.

    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
    CC: clameter@sgi.com
    CC: tony.luck@intel.com
    CC: Keith Owens <kaos@ocs.com.au>
    ---
    include/asm-ia64/intrinsics.h | 4 ++++
    1 file changed, 4 insertions(+)

    Index: linux-2.6-lttng/include/asm-ia64/intrinsics.h
    ===================================================================
    --- linux-2.6-lttng.orig/include/asm-ia64/intrinsics.h 2007-08-12 09:33:57.000000000 -0400
    +++ linux-2.6-lttng/include/asm-ia64/intrinsics.h 2007-08-12 15:09:49.000000000 -0400
    @@ -158,6 +158,10 @@ extern long ia64_cmpxchg_called_with_bad

    /* for compatibility with other platforms: */
    #define cmpxchg(ptr,o,n) cmpxchg_acq(ptr,o,n)
    +#define cmpxchg64(ptr,o,n) cmpxchg_acq(ptr,o,n)
    +
    +#define cmpxchg_local cmpxchg
    +#define cmpxchg64_local cmpxchg64

    #ifdef CONFIG_IA64_DEBUG_CMPXCHG
    # define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128;
    --
    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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