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    Subject[PATCH 04/10] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to ia64
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    atomic.h : Add atomic64 cmpxchg, xchg and add_unless to ia64

    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>

    --- a/include/asm-ia64/atomic.h
    +++ b/include/asm-ia64/atomic.h
    @@ -88,12 +88,16 @@ ia64_atomic64_sub (__s64 i, atomic64_t *v)
    return new;
    }

    -#define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))
    +#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), old, new))
    #define atomic_xchg(v, new) (xchg(&((v)->counter), new))

    +#define atomic64_cmpxchg(v, old, new) \
    + (cmpxchg(&((v)->counter), old, new))
    +#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
    +
    #define atomic_add_unless(v, a, u) \
    ({ \
    - int c, old; \
    + __typeof__(v->counter) c, old; \
    c = atomic_read(v); \
    for (;;) { \
    if (unlikely(c == (u))) \
    @@ -107,6 +111,22 @@ ia64_atomic64_sub (__s64 i, atomic64_t *v)
    })
    #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)

    +#define atomic64_add_unless(v, a, u) \
    +({ \
    + __typeof__(v->counter) c, old; \
    + c = atomic64_read(v); \
    + for (;;) { \
    + if (unlikely(c == (u))) \
    + break; \
    + old = atomic64_cmpxchg((v), c, c + (a)); \
    + if (likely(old == c)) \
    + break; \
    + c = old; \
    + } \
    + c != (u); \
    +})
    +#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
    +
    #define atomic_add_return(i,v) \
    ({ \
    int __ia64_aar_i = (i); \
    -
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      Last update: 2007-02-11 20:27    [W:0.022 / U:0.064 seconds]
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