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From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Subject: [PATCH 08/10] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to sparc64
Date: Sun, 11 Feb 2007 14:17:46 -0500	[thread overview]
Message-ID: <11712214693531-git-send-email-mathieu.desnoyers@polymtl.ca> (raw)
In-Reply-To: <11712214684187-git-send-email-mathieu.desnoyers@polymtl.ca>

atomic.h : Add atomic64 cmpxchg, xchg and add_unless to sparc64

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

--- a/include/asm-sparc64/atomic.h
+++ b/include/asm-sparc64/atomic.h
@@ -70,12 +70,12 @@ 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) (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 +89,26 @@ 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();

  parent reply	other threads:[~2007-02-11 19:23 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-11 19:17 [PATCH 00/10] atomic.h : standardizing atomic primitives Mathieu Desnoyers
2007-02-11 19:17 ` [PATCH 01/10] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to alpha Mathieu Desnoyers
2007-02-11 19:17 ` [PATCH 02/10] atomic.h : Complete atomic_long operations in asm-generic Mathieu Desnoyers
2007-02-11 19:17 ` [PATCH 03/10] atomic.h : i386 type safety fix Mathieu Desnoyers
2007-02-11 19:17 ` [PATCH 04/10] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to ia64 Mathieu Desnoyers
2007-02-11 19:17 ` [PATCH 05/10] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to mips Mathieu Desnoyers
2007-02-11 19:17 ` [PATCH 06/10] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to parisc Mathieu Desnoyers
2007-02-11 19:17 ` [PATCH 07/10] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to powerpc Mathieu Desnoyers
2007-02-11 19:17 ` Mathieu Desnoyers [this message]
2007-02-11 19:17 ` [PATCH 09/10] atomic.h : Add atomic64_xchg to s390 Mathieu Desnoyers
2007-02-11 19:17 ` [PATCH 10/10] atomic.h : Add atomic64 cmpxchg, xchg and add_unless to x86_64 Mathieu Desnoyers
2007-02-12 11:35   ` Andi Kleen
2007-02-12 16:43     ` Mathieu Desnoyers
2007-02-12 16:49       ` [PATCH] atomic.h : atomic_add_unless as inline. Remove system.h atomic.h circular dependency Mathieu Desnoyers

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