[PATCH 23/24] make atomic_read() behave consistently on xtensa
From: Chris Snook <hidden>
Date: 2007-08-09 14:21:29
Also in:
linux-arch, lkml
From: Chris Snook <redacted> Purify volatile use for atomic_t on xtensa. Signed-off-by: Chris Snook <redacted>
--- linux-2.6.23-rc2-orig/include/asm-xtensa/atomic.h 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.23-rc2/include/asm-xtensa/atomic.h 2007-08-09 07:54:59.000000000 -0400@@ -15,7 +15,7 @@ #include <linux/stringify.h> -typedef struct { volatile int counter; } atomic_t; +typedef struct { int counter; } atomic_t; #ifdef __KERNEL__ #include <asm/processor.h>
@@ -47,7 +47,7 @@ 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