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authorAnton Blanchard <anton@samba.org>2010-05-17 14:33:53 +1000
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-17 07:57:27 -0700
commitf3d46f9d3194e0329216002a8724d4c0957abc79 (patch)
tree6d9413e4a448d7b8d342c40297c4fbe0b9c4c2f0 /arch/sparc/include
parente40152ee1e1c7a63f4777791863215e3faa37a86 (diff)
downloadlinux-linaro-f3d46f9d3194e0329216002a8724d4c0957abc79.tar.gz
atomic_t: Cast to volatile when accessing atomic variables
In preparation for removing volatile from the atomic_t definition, this patch adds a volatile cast to all the atomic read functions. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sparc/include')
-rw-r--r--arch/sparc/include/asm/atomic_32.h2
-rw-r--r--arch/sparc/include/asm/atomic_64.h4
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/atomic_32.h b/arch/sparc/include/asm/atomic_32.h
index f0d343c3b95..7ae128b19d3 100644
--- a/arch/sparc/include/asm/atomic_32.h
+++ b/arch/sparc/include/asm/atomic_32.h
@@ -25,7 +25,7 @@ extern int atomic_cmpxchg(atomic_t *, int, int);
extern int atomic_add_unless(atomic_t *, int, int);
extern void atomic_set(atomic_t *, int);
-#define atomic_read(v) ((v)->counter)
+#define atomic_read(v) (*(volatile int *)&(v)->counter)
#define atomic_add(i, v) ((void)__atomic_add_return( (int)(i), (v)))
#define atomic_sub(i, v) ((void)__atomic_add_return(-(int)(i), (v)))
diff --git a/arch/sparc/include/asm/atomic_64.h b/arch/sparc/include/asm/atomic_64.h
index f2e48009989..2050ca02c42 100644
--- a/arch/sparc/include/asm/atomic_64.h
+++ b/arch/sparc/include/asm/atomic_64.h
@@ -13,8 +13,8 @@
#define ATOMIC_INIT(i) { (i) }
#define ATOMIC64_INIT(i) { (i) }
-#define atomic_read(v) ((v)->counter)
-#define atomic64_read(v) ((v)->counter)
+#define atomic_read(v) (*(volatile int *)&(v)->counter)
+#define atomic64_read(v) (*(volatile long *)&(v)->counter)
#define atomic_set(v, i) (((v)->counter) = i)
#define atomic64_set(v, i) (((v)->counter) = i)