do_mount_root
err = do_mount_root(name, p, flags, root_mount_data);
if (!do_mount_root(root_dev, "nfs", root_mountflags, root_data))
if (!do_mount_root(root_dev, "cifs", root_mountflags,
err = do_mount_root(root_device_name, fstype, root_mountflags,