Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030319AbXAYQWE (ORCPT ); Thu, 25 Jan 2007 11:22:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030312AbXAYQVm (ORCPT ); Thu, 25 Jan 2007 11:21:42 -0500 Received: from tomts36.bellnexxia.net ([209.226.175.93]:40091 "EHLO tomts36-srv.bellnexxia.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030302AbXAYQVJ (ORCPT ); Thu, 25 Jan 2007 11:21:09 -0500 From: Mathieu Desnoyers To: linux-kernel@vger.kernel.org Cc: Linus Torvalds , Andrew Morton , Ingo Molnar , Greg Kroah-Hartman , Christoph Hellwig , ltt-dev@shafik.org, systemtap@sources.redhat.com, Douglas Niehaus , "Martin J. Bligh" , Thomas Gleixner , Paul Mackerras , Mathieu Desnoyers Subject: [PATCH 05/09] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to mips Date: Thu, 25 Jan 2007 11:15:50 -0500 Message-Id: <1169741756845-git-send-email-mathieu.desnoyers@polymtl.ca> X-Mailer: git-send-email 1.4.4.3 In-Reply-To: <11697417541743-git-send-email-mathieu.desnoyers@polymtl.ca> References: <11697417541743-git-send-email-mathieu.desnoyers@polymtl.ca> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2231 Lines: 62 atomic.h : Add atomic64 cmpxchg, xchg and add_unless to mips Signed-off-by: Mathieu Desnoyers --- a/include/asm-mips/atomic.h +++ b/include/asm-mips/atomic.h @@ -291,8 +291,9 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v) return result; } -#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) -#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) +#define atomic_cmpxchg(v, o, n) \ + (((__typeof__((v)->counter)))cmpxchg(&((v)->counter), (o), (n))) +#define atomic_xchg(v, new) (xchg(&((v)->counter), (new))) /** * atomic_add_unless - add unless the number is a given value @@ -305,7 +306,7 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v) */ #define atomic_add_unless(v, a, u) \ ({ \ - int c, old; \ + __typeof__((v)->counter) c, old; \ c = atomic_read(v); \ while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \ c = old; \ @@ -651,6 +652,29 @@ static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v) return result; } +#define atomic64_cmpxchg(v, o, n) \ + (((__typeof__((v)->counter)))cmpxchg(&((v)->counter), (o), (n))) +#define atomic64_xchg(v, new) (xchg(&((v)->counter), (new))) + +/** + * atomic64_add_unless - add unless the number is a given value + * @v: pointer of type atomic64_t + * @a: the amount to add to v... + * @u: ...unless v is equal to u. + * + * Atomically adds @a to @v, so long as it was not @u. + * Returns non-zero if @v was not @u, and zero otherwise. + */ +#define atomic64_add_unless(v, a, u) \ +({ \ + __typeof__((v)->counter) c, old; \ + c = atomic_read(v); \ + while (c != (u) && (old = atomic64_cmpxchg((v), c, c + (a))) != c) \ + c = old; \ + c != (u); \ +}) +#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) + #define atomic64_dec_return(v) atomic64_sub_return(1,(v)) #define atomic64_inc_return(v) atomic64_add_return(1,(v)) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/