From 3c548e6eda4b38a579b5bc74af08477304fa376c Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 19 Jul 2014 15:57:48 -0400 Subject: [PATCH] fix missing barrier instructions in powerpc atomic asm (cherry picked from commit 1456b7ae6b72a4f2c446243acdde7c951268d4ab) --- arch/powerpc/atomic.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/atomic.h b/arch/powerpc/atomic.h index a1049bdb..c4ad40cd 100644 --- a/arch/powerpc/atomic.h +++ b/arch/powerpc/atomic.h @@ -25,11 +25,14 @@ static inline int a_ctz_64(uint64_t x) static inline int a_cas(volatile int *p, int t, int s) { - __asm__("1: lwarx %0, 0, %4\n" + __asm__("\n" + " sync\n" + "1: lwarx %0, 0, %4\n" " cmpw %0, %2\n" " bne 1f\n" " stwcx. %3, 0, %4\n" " bne- 1b\n" + " isync\n" "1: \n" : "=&r"(t), "+m"(*p) : "r"(t), "r"(s), "r"(p) : "cc", "memory" ); return t; -- 2.25.1