diff -Nrup linux-2.4.10.orig/drivers/char/drm/drm_proc.h linux-2.4.10/drivers/char/drm/drm_proc.h
--- linux-2.4.10.orig/drivers/char/drm/drm_proc.h	Wed Aug 15 23:21:47 2001
+++ linux-2.4.10/drivers/char/drm/drm_proc.h	Fri Oct  5 13:33:54 2001
@@ -186,7 +186,7 @@ static int DRM(_vm_info)(char *buf, char
 	DRM_PROC_PRINT("slot	 offset	      size type flags	 "
 		       "address mtrr\n\n");
 	i = 0;
-	list_for_each(list, &dev->maplist->head) {
+	if (dev->maplist != NULL) list_for_each(list, &dev->maplist->head) {
 		r_list = (drm_map_list_t *)list;
 		map = r_list->map;
 		if(!map) continue;