diff --git a/mm/zbud.c b/mm/zbud.c
index 7ec5f27a68b08df5fbc1048049b6bc03b3014be9..c48e60bae4a148a1eb02fa03b4541bbd2c353e3b 100644
--- a/mm/zbud.c
+++ b/mm/zbud.c
@@ -93,8 +93,14 @@
  */
 struct zbud_pool {
 	spinlock_t lock;
-	struct list_head unbuddied[NCHUNKS];
-	struct list_head buddied;
+	union {
+		/*
+		 * Reuse unbuddied[0] as buddied on the ground that
+		 * unbuddied[0] is unused.
+		 */
+		struct list_head buddied;
+		struct list_head unbuddied[NCHUNKS];
+	};
 	struct list_head lru;
 	u64 pages_nr;
 	const struct zbud_ops *ops;