move_config() {
	local partdev

	. /lib/upgrade/common.sh

	if export_bootdevice && export_partdevice partdev 1; then
		if mount -o rw,noatime "/dev/$partdev" /mnt; then
			if [ -f "/mnt/$BACKUP_FILE" ]; then
				mv -f "/mnt/$BACKUP_FILE" /
			fi
			umount /mnt
		fi
	fi
}

boot_hook_add preinit_mount_root move_config