20  * - check for first/last_usable_lba outside of size of disk
26  * - On-disk structure and copy in memory is *always* LE now - 
41  *   thing that keeps EFI GUIDs on disk.
61  *   sector of an odd-sized disk from user space.  No tools have ever
127  * @disk: block device
131  *  the part[0] entry for this disk, and is the number of
132  *  physical sectors available on the disk.
134 static u64 last_lba(struct gendisk *disk)  in last_lba()  argument
136 	return div_u64(bdev_nr_bytes(disk->part0),  in last_lba()
137 		       queue_logical_block_size(disk->queue)) - 1ULL;  in last_lba()
203 	 * Protective MBRs take up the lesser of the whole disk  in is_pmbr_valid()
204 	 * or 2 TiB (32bit LBA), ignoring the rest of the disk.  in is_pmbr_valid()
207 	 * the disk size.  in is_pmbr_valid()
212 	 * an image from a smaller disk to a larger disk.  in is_pmbr_valid()
217 			pr_debug("GPT: mbr size in lba (%u) different than whole disk (%u).\n",  in is_pmbr_valid()
226  * read_lba(): Read bytes from disk, starting at given LBA
227  * @state: disk parsed partitions
232  * Description: Reads @count bytes from @state->disk into @buffer.
240 		(queue_logical_block_size(state->disk->queue) / 512);  in read_lba()
242 	if (!buffer || lba > last_lba(state->disk))  in read_lba()
263  * alloc_read_gpt_entries(): reads partition entries from disk
264  * @state: disk parsed partitions
298  * alloc_read_gpt_header(): Allocates GPT header, reads into it from disk
299  * @state: disk parsed partitions
303  * and fills a GPT header starting at @ from @state->disk.
310 	unsigned ssz = queue_logical_block_size(state->disk->queue);  in alloc_read_gpt_header()
327  * @state: disk parsed partitions
357 			queue_logical_block_size(state->disk->queue)) {  in is_gpt_valid()
360 			queue_logical_block_size(state->disk->queue));  in is_gpt_valid()
394 	 * within the disk.  in is_gpt_valid()
396 	lastlba = last_lba(state->disk);  in is_gpt_valid()
456  * @lastlba: last lba of the disk
471  * compare_gpts() - Search disk for valid GPT headers and PTEs
545 		pr_warn("GPT:Primary header thinks Alt. header is not at the end of the disk.\n");  in compare_gpts()
553 		pr_warn("GPT:Alternate GPT header not at the end of the disk.\n");  in compare_gpts()
566  * find_valid_gpt() - Search disk for valid GPT headers and PTEs
567  * @state: disk parsed partitions
588 	struct gendisk *disk = state->disk;  in find_valid_gpt()  local
589 	const struct block_device_operations *fops = disk->fops;  in find_valid_gpt()
590 	sector_t total_sectors = get_capacity(state->disk);  in find_valid_gpt()
596 	lastlba = last_lba(state->disk);  in find_valid_gpt()
628 		err = fops->alternative_gpt_sector(disk, &agpt_sector);  in find_valid_gpt()
696  * @state: disk parsed partitions
698  * Description: called from check.c, if the disk contains GPT
701  * If the first block on the disk is a legacy MBR,
718 	unsigned ssz = queue_logical_block_size(state->disk->queue) / 512;  in efi_partition()
735 		if (!is_pte_valid(&ptes[i], last_lba(state->disk)))  in efi_partition()