add_mtd_device
ret = add_mtd_device(child);
ret = add_mtd_device(&concat->mtd);
ret = add_mtd_device(mtd);
ret = add_mtd_device(mtd);
int __must_check add_mtd_device(struct mtd_info *mtd);
ret = add_mtd_device(child);
ret = add_mtd_device(child);