[PATCH 19/23] make atomic_read() and atomic_set() behavior consistent on sparc64

From: Chris Snook
Date: Mon Aug 13 2007 - 10:38:40 EST


From: Chris Snook <csnook@xxxxxxxxxx>

Use volatile consistently in atomic.h on sparc64.

Signed-off-by: Chris Snook <csnook@xxxxxxxxxx>

--- linux-2.6.23-rc3-orig/include/asm-sparc64/atomic.h 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.23-rc3/include/asm-sparc64/atomic.h 2007-08-13 06:17:01.000000000 -0400
@@ -11,17 +11,31 @@
#include <linux/types.h>
#include <asm/system.h>

-typedef struct { volatile int counter; } atomic_t;
-typedef struct { volatile __s64 counter; } atomic64_t;
+typedef struct { int counter; } atomic_t;
+typedef struct { __s64 counter; } atomic64_t;

#define ATOMIC_INIT(i) { (i) }
#define ATOMIC64_INIT(i) { (i) }

-#define atomic_read(v) ((v)->counter)
-#define atomic64_read(v) ((v)->counter)
+static __inline__ int atomic_read(atomic_t *v)
+{
+ return *(volatile int *)&v->counter;
+}
+
+static __inline__ __s64 atomic64_read(atomic64_t *v)
+{
+ return *(volatile __s64 *)&v->counter;
+}

-#define atomic_set(v, i) (((v)->counter) = i)
-#define atomic64_set(v, i) (((v)->counter) = i)
+static __inline__ void atomic_set(atomic_t *v, int i)
+{
+ *(volatile int *)&v->counter = i;
+}
+
+static __inline__ void atomic64_set(atomic64_t *v, __s64 i)
+{
+ *(volatile __s64 *)&v->counter = i;
+}

extern void atomic_add(int, atomic_t *);
extern void atomic64_add(int, atomic64_t *);
-
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