diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index adb002b8648d..eace45a18d45 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2144,7 +2144,7 @@ static void event_callback(void *context)
 {
 	unsigned long flags;
 	LIST_HEAD(uevents);
-	struct mapped_device *md = (struct mapped_device *) context;
+	struct mapped_device *md = context;
 
 	spin_lock_irqsave(&md->uevent_lock, flags);
 	list_splice_init(&md->uevent_list, &uevents);