remove __lockbarrier, which i forgot to remove in the previous.

sys/arch/x86/include/lock.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: lock.h,v 1.7 2004/10/31 10:39:34 yamt Exp $	*/
+/*	$NetBSD: lock.h,v 1.8 2004/11/25 04:50:48 yamt Exp $	*/
 
 /*-
  * Copyright (c) 2000 The NetBSD Foundation, Inc.
@@ -49,16 +49,6 @@
 
 #include <machine/cpufunc.h>
 
-/*
- * compiler barrier: prevent reordering of instructions.
- * XXX something similar will move to <sys/cdefs.h>
- * or thereabouts.
- * This prevents the compiler from reordering code around
- * this "instruction", acting as a sequence point for code generation.
- */
-
-#define __lockbarrier() __asm __volatile("": : :"memory")
-
 #ifdef LOCKDEBUG
 
 extern void __cpu_simple_lock_init(__cpu_simple_lock_t *);