fix missing barriers in powerpc atomic store

12 years ago · 522a0de210
1 changed files with 5 additions and 1 deletions
--- 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()