diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index e7eb58161942..9e56c78fe519 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -559,16 +559,8 @@ struct extent_info {
 };
 
 struct extent_node {
-	struct rb_node rb_node;
-	union {
-		struct {
-			unsigned int fofs;
-			unsigned int len;
-			u32 blk;
-		};
-		struct extent_info ei;	/* extent info */
-
-	};
+	struct rb_node rb_node;		/* rb node located in rb-tree */
+	struct extent_info ei;		/* extent info */
 	struct list_head list;		/* node in global extent list of sbi */
 	struct extent_tree *et;		/* extent tree pointer */
 };