Index: sys/kern/vfs_mountroot.c
===================================================================
--- sys/kern/vfs_mountroot.c
+++ sys/kern/vfs_mountroot.c
@@ -1040,6 +1040,8 @@
 	 * to behave exactly as it used to work before.
 	 */
 	vfs_mountroot_wait();
+	if (parse_mount_dev_present(dev))
+		return (0);
 	printf("mountroot: waiting for device %s...\n", dev);
 	delay = hz / 10;
 	timeout = root_mount_timeout * hz;