diff --git a/[refs] b/[refs]
index 41becfa1ce5d..ed2091b69c26 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 24a6f5b8589d2abfbf523c59ab1258726edc164f
+refs/heads/master: de1f016f882e52facc3c8609599f827bcdd14af9
diff --git a/trunk/drivers/block/nbd.c b/trunk/drivers/block/nbd.c
index a32fb41246f8..e6fc716aca45 100644
--- a/trunk/drivers/block/nbd.c
+++ b/trunk/drivers/block/nbd.c
@@ -53,7 +53,6 @@
 #define DBG_BLKDEV      0x0100
 #define DBG_RX          0x0200
 #define DBG_TX          0x0400
-static DEFINE_MUTEX(nbd_mutex);
 static unsigned int debugflags;
 #endif /* NDEBUG */
 
@@ -718,11 +717,9 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
 	dprintk(DBG_IOCTL, "%s: nbd_ioctl cmd=%s(0x%x) arg=%lu\n",
 			lo->disk->disk_name, ioctl_cmd_to_ascii(cmd), cmd, arg);
 
-	mutex_lock(&nbd_mutex);
 	mutex_lock(&lo->tx_lock);
 	error = __nbd_ioctl(bdev, lo, cmd, arg);
 	mutex_unlock(&lo->tx_lock);
-	mutex_unlock(&nbd_mutex);
 
 	return error;
 }