* [PATCH 10/24] make atomic_read() behave consistently on m32r
@ 2007-08-09 13:53 Chris Snook
0 siblings, 0 replies; only message in thread
From: Chris Snook @ 2007-08-09 13:53 UTC (permalink / raw)
To: linux-kernel, linux-arch, torvalds
Cc: netdev, akpm, ak, heiko.carstens, davem, schwidefsky, wensong,
horms, wjiang, cfriesen, zlynx, rpjday, jesper.juhl
From: Chris Snook <csnook@redhat.com>
Purify volatile use for atomic_t on m32r.
Signed-off-by: Chris Snook <csnook@redhat.com>
--- linux-2.6.23-rc2-orig/include/asm-m32r/atomic.h 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.23-rc2/include/asm-m32r/atomic.h 2007-08-09 06:55:53.000000000 -0400
@@ -22,7 +22,7 @@
* on us. We need to use _exactly_ the address the user gave us,
* not some alias that contains the same information.
*/
-typedef struct { volatile int counter; } atomic_t;
+typedef struct { int counter; } atomic_t;
#define ATOMIC_INIT(i) { (i) }
@@ -32,7 +32,7 @@ typedef struct { volatile int counter; }
*
* Atomically reads the value of @v.
*/
-#define atomic_read(v) ((v)->counter)
+#define atomic_read(v) (*(volatile int *)&(v)->counter)
/**
* atomic_set - set atomic variable
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2007-08-09 13:53 [PATCH 10/24] make atomic_read() behave consistently on m32r Chris Snook
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