arch/tile: Fix atomic_read() definition to use ACCESS_ONCE

This adds the volatile cast which forces the compiler to emit the load. Suggested by Peter Zijlstra <[email protected]>.

---
 arch/tile/include/asm/atomic.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index b8c49f9..75a1602 100644
@@ -32,7 +32,7 @@
  */
 static inline int atomic_read(const atomic_t *v)
 {
-       return v->counter;
+	return ACCESS_ONCE(v->counter);
 }
 
 /**

1.6.5.2