Index: linux-2.6.18-mm2/include/linux/mm.h
===================================================================
--- linux-2.6.18-mm2.orig/include/linux/mm.h	2006-09-30 13:33:27.000000000 -0500
+++ linux-2.6.18-mm2/include/linux/mm.h	2006-10-02 12:08:14.387946148 -0500
@@ -452,7 +452,7 @@ static inline enum zone_type page_zonenu
  */
 static inline int page_zone_id(struct page *page)
 {
-	BUG_ON(ZONEID_PGSHIFT == 0 && ZONEID_MASK);
+	BUILD_BUG_ON(ZONEID_PGSHIFT == 0 && ZONEID_MASK);
 	return (page->flags >> ZONEID_PGSHIFT) & ZONEID_MASK;
 }