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Date: Thu, 11 Jan 2007 20:35:40 -0500 From: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> To: linux-kernel@...r.kernel.org Cc: Linus Torvalds <torvalds@...l.org>, Andrew Morton <akpm@...l.org>, Ingo Molnar <mingo@...hat.com>, Greg Kroah-Hartman <gregkh@...e.de>, Christoph Hellwig <hch@...radead.org>, ltt-dev@...fik.org, systemtap@...rces.redhat.com, Douglas Niehaus <niehaus@...s.ku.edu>, "Martin J. Bligh" <mbligh@...igh.org>, Thomas Gleixner <tglx@...utronix.de>, Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> Subject: [PATCH 08/09] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to sparc64 atomic.h : Add atomic64 cmpxchg, xchg and add_unless to sparc64 Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> --- a/include/asm-sparc64/atomic.h +++ b/include/asm-sparc64/atomic.h @@ -70,12 +70,13 @@ extern int atomic64_sub_ret(int, atomic64_t *); #define atomic_add_negative(i, v) (atomic_add_ret(i, v) < 0) #define atomic64_add_negative(i, v) (atomic64_add_ret(i, v) < 0) -#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) +#define atomic_cmpxchg(v, o, n) \ + ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n))) #define atomic_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))) \ @@ -89,6 +90,26 @@ extern int atomic64_sub_ret(int, atomic64_t *); }) #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) +#define atomic64_cmpxchg(v, o, n) \ + ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n))) +#define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) + +#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; \ + } \ + likely(c != (u)); \ +}) +#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) + /* Atomic operations are already serializing */ #ifdef CONFIG_SMP #define smp_mb__before_atomic_dec() membar_storeload_loadload(); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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