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atomic.h: add atomic64 cmpxchg, xchg and add_unless to ia64

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Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mathieu Desnoyers 2007-05-08 00:34:22 -07:00 committed by Linus Torvalds
parent e656e245d5
commit 819791319b
1 changed files with 22 additions and 2 deletions
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24
include/asm-ia64/atomic.h
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@ -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); \