From: Rich Felker <dalias@aerifal.cx>
Date: Mon, 7 Apr 2014 08:28:12 +0000 (-0400)
Subject: fix arm atomic asm register constraint
X-Git-Tag: v1.1.0~14
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=efe07b0f8914eccf5eabce0dbd6ea5da7d7db38c;p=oweals%2Fmusl.git

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.
---

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;
 }