diff --git a/mm/internal.h b/mm/internal.h
index b99a694..9879e52 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -123,6 +123,10 @@
 	unsigned long migrate_pfn;	/* isolate_migratepages search base */
 	bool sync;			/* Synchronous migration */
 	bool ignore_skip_hint;		/* Scan blocks even if marked skip */
+	bool finished_update_free;	/* True when the zone cached pfns are
+					 * no longer being updated
+					 */
+	bool finished_update_migrate;
 
 	int order;			/* order a direct compactor needs */
 	int migratetype;		/* MOVABLE, RECLAIMABLE etc */