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 $
  *
  *-------------------------------------------------------------------------
  */
@@ -231,16 +231,16 @@ tas(volatile slock_t *lock)
 	__asm__ __volatile__(
 "	lwarx   %0,0,%3		\n"
 "	cmpwi   %0,0		\n"
-"	bne     1f		\n"
+"	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"
+"	b		3f			\n"
+"2:						\n"
+"	isync				\n"
 "	li      %2,0		\n"
-"3:				\n"
+"3:						\n"
 
 :	"=&r" (_t), "=m" (lock), "=r" (_res)
 :	"r" (lock)