Index: linux-2.6.15-rc3-mm1/mm/vmscan.c
===================================================================
--- linux-2.6.15-rc3-mm1.orig/mm/vmscan.c	2005-11-30 09:48:03.000000000 -0800
+++ linux-2.6.15-rc3-mm1/mm/vmscan.c	2005-11-30 09:50:57.000000000 -0800
@@ -742,7 +742,7 @@ int migrate_page_remove_references(struc
 						&mapping->page_tree,
 						page_index(page));
 
-	if (!page->mapping ||
+	if (!page_mapping(page) ||
 	    page_count(page) != nr_refs ||
 	    *radix_pointer != page) {
 		write_unlock_irq(&mapping->tree_lock);