From: Chris Snook <csnook@redhat.com>
To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
torvalds@linux-foundation.org
Cc: netdev@vger.kernel.org, akpm@linux-foundation.org, ak@suse.de,
heiko.carstens@de.ibm.com, davem@davemloft.net,
schwidefsky@de.ibm.com, wensong@linux-vs.org, horms@verge.net.au,
wjiang@resilience.com, cfriesen@nortel.com, zlynx@acm.org,
rpjday@mindspring.com, jesper.juhl@gmail.com
Subject: [PATCH 10/24] make atomic_read() behave consistently on m32r
Date: Thu, 9 Aug 2007 09:53:48 -0400 [thread overview]
Message-ID: <20070809135348.GA16389@shell.boston.redhat.com> (raw)
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
reply other threads:[~2007-08-09 13:54 UTC|newest]
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