We are reading from memory locations pointed to by p1 and p2 in the asm block. Add a memory clobber flag to make gcc aware of this.
Signed-off-by: Pranith Kumar <[email protected]> --- arch/x86/include/asm/cmpxchg.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h index 4a2e5bc..3e83949 100644 --- a/arch/x86/include/asm/cmpxchg.h +++ b/arch/x86/include/asm/cmpxchg.h @@ -214,7 +214,8 @@ extern void __add_wrong_size(void) : "=a" (__ret), "+d" (__old2), \ "+m" (*(p1)), "+m" (*(p2)) \ : "i" (2 * sizeof(long)), "a" (__old1), \ - "b" (__new1), "c" (__new2)); \ + "b" (__new1), "c" (__new2) \ + : "memory"); \ __ret; \ }) -- 2.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
