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arch/tile: Fix atomic_read() definition to use ACCESS_ONCE
author
Chris Metcalf
<cmetcalf@tilera.com>
Fri, 25 Feb 2011 13:46:38 +0000
(08:46 -0500)
committer
Chris Metcalf
<cmetcalf@tilera.com>
Fri, 25 Feb 2011 13:46:38 +0000
(08:46 -0500)
This adds the volatile cast which forces the compiler to emit the load.
Suggested by Peter Zijlstra <peterz@infradead.org>.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
arch/tile/include/asm/atomic.h
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diff --git
a/arch/tile/include/asm/atomic.h
b/arch/tile/include/asm/atomic.h
index
b8c49f9
..
75a1602
100644
(file)
--- a/
arch/tile/include/asm/atomic.h
+++ b/
arch/tile/include/asm/atomic.h
@@
-32,7
+32,7
@@
*/
static inline int atomic_read(const atomic_t *v)
{
- return
v->counter
;
+ return
ACCESS_ONCE(v->counter)
;
}
/**