Put the isync where it's supposed to be.

src/include/storage/s_lock.h

@@ -63,7 +63,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	  $Id: s_lock.h,v 1.103 2002/11/22 01:13:16 tgl Exp $
+ *	  $Id: s_lock.h,v 1.104 2003/04/04 05:32:30 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -234,11 +234,11 @@ tas(volatile slock_t *lock)
 "	bne     1f			\n"
 "	addi    %0,%0,1		\n"
 "	stwcx.  %0,0,%3		\n"
-"	isync			\n"
 "	beq     2f         	\n"
 "1:	li      %2,1		\n"
 "	b		3f			\n"
 "2:						\n"
+"	isync				\n"
 "	li      %2,0		\n"
 "3:						\n"