From efe07b0f8914eccf5eabce0dbd6ea5da7d7db38c Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Mon, 7 Apr 2014 04:28:12 -0400 Subject: [PATCH] fix arm atomic asm register constraint the "m" constraint could give a memory reference with an offset that's not compatible with ldrex/strex, so the arm-specific "Q" constraint is needed instead. --- arch/arm/atomic.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/atomic.h b/arch/arm/atomic.h index fe88225b..50ad9478 100644 --- a/arch/arm/atomic.h +++ b/arch/arm/atomic.h @@ -37,7 +37,7 @@ static inline int __k_cas(int t, int s, volatile int *p) " beq 1b\n" " mcr p15,0,r0,c7,c10,5\n" : "=&r"(ret) - : "r"(t), "r"(s), "m"(*p) + : "r"(t), "r"(s), "Q"(*p) : "memory", "cc" ); return ret; }