From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 19 Jul 2014 22:34:10 +0000 (-0400)
Subject: fix missing barriers in powerpc atomic store
X-Git-Tag: v1.0.4~5
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=1b61e4cab919c39af4462ee2fbccc9e07a59aac0;p=oweals%2Fmusl.git

fix missing barriers in powerpc atomic store

(cherry picked from commit 522a0de2101abd12b19a4d2ba5c09abbb7c5fc79)
---

diff --git a/arch/powerpc/atomic.h b/arch/powerpc/atomic.h
index c4ad40cd..a082c09b 100644
--- a/arch/powerpc/atomic.h
+++ b/arch/powerpc/atomic.h
@@ -77,7 +77,11 @@ static inline void a_dec(volatile int *x)
 
 static inline void a_store(volatile int *p, int x)
 {
-	*p=x;
+	__asm__ __volatile__ ("\n"
+		"	sync\n"
+		"	stw %1, %0\n"
+		"	isync\n"
+		: "=m"(*p) : "r"(x) : "memory" );
 }
 
 static inline void a_spin()