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>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/alpha/include/asm/atomic.h b/arch/alpha/include/asm/atomic.h
index 610dff44d94b..e756d04b6cd5 100644
--- a/arch/alpha/include/asm/atomic.h
+++ b/arch/alpha/include/asm/atomic.h
@@ -17,8 +17,8 @@
 #define ATOMIC_INIT(i)          ( (atomic_t) { (i) } )
 #define ATOMIC64_INIT(i)        ( (atomic64_t) { (i) } )
 
-#define atomic_read(v)          ((v)->counter + 0)
-#define atomic64_read(v)        ((v)->counter + 0)
+#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))