Subject: [PATCH 10/24] make atomic_read() behave consistently on m32r

From: Chris Snook <[email-masked]>
Date: Thu, 9 Aug 2007 09:53:48 -0400

From: Chris Snook <[email-masked]>

Purify volatile use for atomic_t on m32r.

Signed-off-by: Chris Snook <[email-masked]>

--- 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