--- ./mm/rmap.c.orig	2005-05-20 01:29:14.066467151 -0700
+++ ./mm/rmap.c	2005-05-20 01:30:06.620649901 -0700
@@ -694,7 +694,7 @@
 		(*mapcount)--;
 	}
 
-	pte_unmap(pte);
+	pte_unmap(pte-1);
 out_unlock:
 	spin_unlock(&mm->page_table_lock);
 }