diff --git a/mm/internal.h b/mm/internal.h
index 3ac544f..f6f3353 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -174,6 +174,7 @@
 	enum migrate_mode mode;		/* Async or sync migration mode */
 	bool ignore_skip_hint;		/* Scan blocks even if marked skip */
 	bool direct_compaction;		/* False from kcompactd or /proc/... */
+	bool whole_zone;		/* Whole zone has been scanned */
 	int order;			/* order a direct compactor needs */
 	const gfp_t gfp_mask;		/* gfp mask of a direct compactor */
 	const unsigned int alloc_flags;	/* alloc flags of a direct compactor */