diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8e83f02..2f55295 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -237,16 +237,7 @@
 	printk(KERN_EMERG "Trying to fix it up, but a reboot is needed\n"
 		KERN_EMERG "Backtrace:\n");
 	dump_stack();
-	page->flags &= ~(1 << PG_lru	|
-			1 << PG_private |
-			1 << PG_locked	|
-			1 << PG_active	|
-			1 << PG_dirty	|
-			1 << PG_reclaim |
-			1 << PG_slab    |
-			1 << PG_swapcache |
-			1 << PG_writeback |
-			1 << PG_buddy );
+	page->flags &= ~PAGE_FLAGS_CLEAR_WHEN_BAD;
 	set_page_count(page, 0);
 	reset_page_mapcount(page);
 	page->mapping = NULL;
@@ -463,16 +454,7 @@
 		(page->mapping != NULL)  |
 		(page_get_page_cgroup(page) != NULL) |
 		(page_count(page) != 0)  |
-		(page->flags & (
-			1 << PG_lru	|
-			1 << PG_private |
-			1 << PG_locked	|
-			1 << PG_active	|
-			1 << PG_slab	|
-			1 << PG_swapcache |
-			1 << PG_writeback |
-			1 << PG_reserved |
-			1 << PG_buddy ))))
+		(page->flags & PAGE_FLAGS_CHECK_AT_FREE)))
 		bad_page(page);
 	if (PageDirty(page))
 		__ClearPageDirty(page);
@@ -616,17 +598,7 @@
 		(page->mapping != NULL)  |
 		(page_get_page_cgroup(page) != NULL) |
 		(page_count(page) != 0)  |
-		(page->flags & (
-			1 << PG_lru	|
-			1 << PG_private	|
-			1 << PG_locked	|
-			1 << PG_active	|
-			1 << PG_dirty	|
-			1 << PG_slab    |
-			1 << PG_swapcache |
-			1 << PG_writeback |
-			1 << PG_reserved |
-			1 << PG_buddy ))))
+		(page->flags & PAGE_FLAGS_CHECK_AT_PREP)))
 		bad_page(page);
 
 	/*