--- 2.2.17pre20/include/asm-alpha/spinlock.h.~1~	Thu Aug 24 17:44:04 2000
+++ 2.2.17pre20/include/asm-alpha/spinlock.h	Fri Sep  1 03:46:00 2000
@@ -231,6 +231,7 @@
 static inline void read_unlock(rwlock_t * lock)
 {
 	long regx;
+	mb();
 	__asm__ __volatile__(
 	"1:	ldl_l	%1,%0\n"
 	"	addl	%1,2,%1\n"