On Mon, Aug 13, 2007 at 07:09:46AM -0400, Chris Snook wrote:
> From: Chris Snook <[email protected]>
>
> Use volatile consistently in atomic.h on arm.
>
> Signed-off-by: Chris Snook <[email protected]>
>
> --- linux-2.6.23-rc3-orig/include/asm-arm/atomic.h 2007-07-08 19:32:17.000000000 -0400
> +++ linux-2.6.23-rc3/include/asm-arm/atomic.h 2007-08-13 04:44:50.000000000 -0400
> @@ -14,13 +14,16 @@
> #include <linux/compiler.h>
> #include <asm/system.h>
>
> -typedef struct { volatile int counter; } atomic_t;
> +typedef struct { int counter; } atomic_t;
>
> #define ATOMIC_INIT(i) { (i) }
>
> #ifdef __KERNEL__
>
> -#define atomic_read(v) ((v)->counter)
> +static inline int atomic_read(atomic_t *v)
> +{
> + return *(volatile int *)&v->counter;
> +}
>
> #if __LINUX_ARM_ARCH__ >= 6
>
...
In the first email of the series:
> By popular demand, I've redone the patchset to include volatile casts in
> atomic_set as well. I've also converted the macros to inline functions, to
> help catch type mismatches at compile time.
and in the rest of include/asm-arm/atomic.h:
#else /* ARM_ARCH_6 */
#include <asm/system.h>
#ifdef CONFIG_SMP
#error SMP not supported on pre-ARMv6 CPUs
#endif
#define atomic_set(v,i) (((v)->counter) = (i))
Seems you missed that. Grep is a wonderful tool.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
-
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