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    Subject[PATCH 3/5] x86-32: allow UP/SMP lock replacement in cmpxchg64 (v2)
    Date
    Changes in v2:
    - Naming change

    Use the functionality just introduced in the previous patch.

    Signed-off-by: Luca Barbieri <luca@luca-barbieri.com>
    ---
    arch/x86/include/asm/cmpxchg_32.h | 3 ++-
    1 files changed, 2 insertions(+), 1 deletions(-)

    diff --git a/arch/x86/include/asm/cmpxchg_32.h b/arch/x86/include/asm/cmpxchg_32.h
    index ffb9bb6..8859e12 100644
    --- a/arch/x86/include/asm/cmpxchg_32.h
    +++ b/arch/x86/include/asm/cmpxchg_32.h
    @@ -271,7 +271,8 @@ extern unsigned long long cmpxchg_486_u64(volatile void *, u64, u64);
    __typeof__(*(ptr)) __ret; \
    __typeof__(*(ptr)) __old = (o); \
    __typeof__(*(ptr)) __new = (n); \
    - alternative_io("call cmpxchg8b_emu", \
    + alternative_io(LOCK_PREFIX_HERE \
    + "call cmpxchg8b_emu", \
    "lock; cmpxchg8b (%%esi)" , \
    X86_FEATURE_CX8, \
    "=A" (__ret), \
    --
    1.6.6.1.476.g01ddb


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