/* ubi_calc_fm_size - calculates the fastmap size in bytes for an UBI device. @ubi: UBI device description object  */
size_t ubi_calc_fm_size(struct ubi_device *ubi)
/* ubi_calc_fm_size - calculates the fastmap size in bytes for an UBI device. @ubi: UBI device description object  */
size_t ubi_calc_fm_size(struct ubi_device *ubi)
{
	size_t size;
	size = sizeof(struct ubi_fm_sb) +
		sizeof(struct ubi_fm_hdr) +
		sizeof(struct ubi_fm_scan_pool) +
		sizeof(struct ubi_fm_scan_pool) +
		(ubi->peb_count * sizeof(struct ubi_fm_ec)) +
		(sizeof(struct ubi_fm_eba) +
		(ubi->peb_count * sizeof(__be32))) +
		sizeof(struct ubi_fm_volhdr) * UBI_MAX_VOLUMES;
	return roundup(size, ubi->leb_size);
}