diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index a58a4c30265e639f0af99b6a2ccb6e1330f641cb..1f3339961159265454782aa8becf080dc37b10ea 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -2569,8 +2569,6 @@ backlog_store(struct mddev *mddev, const char *buf, size_t len)
 			mddev_destroy_serial_pool(mddev, NULL, false);
 	} else if (backlog && !mddev->serial_info_pool) {
 		/* serial_info_pool is needed since backlog is not zero */
-		struct md_rdev *rdev;
-
 		rdev_for_each(rdev, mddev)
 			mddev_create_serial_pool(mddev, rdev, false);
 	}