Add "memory" clobber to mtpr for barrier. See also kern/38637.

2009-05-13 03:40:13 +00:00 · 2009-05-13 03:40:13 +00:00 · 033728692b
parent f3c29cad43
commit 033728692b
1 changed files with 4 additions and 3 deletions
--- a/sys/arch/vax/include/mtpr.h
+++ b/sys/arch/vax/include/mtpr.h
@ -1,4 +1,4 @@
-/*      $NetBSD: mtpr.h,v 1.20 2007/02/16 01:34:03 matt Exp $     */
+/*      $NetBSD: mtpr.h,v 1.21 2009/05/13 03:40:13 mhitch Exp $     */

 /*
 * Copyright (c) 1994 Ludd, University of Lule}, Sweden.
@ -169,10 +169,11 @@
 static inline void
 mtpr(register_t val, int reg)
 {
-	__asm volatile (
+	__asmB volatile (
 		"mtpr %0,%1"
 	    : /* No output */
-	    : "g" (val), "g" (reg));
+	    : "g" (val), "g" (reg)
+	    : "memory");
 }

 static inline register_t