Commit 0bdfbca8 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Jens Axboe
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block: Add alternative_gpt_sector() operation 



Add alternative_gpt_sector() block device operation which specifies
alternative location of a GPT entry. This allows us to support Android
devices that have GPT entry at a non-standard location and can't be
repartitioned easily.

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Suggested-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDmitry Osipenko <digetx@gmail.com>
Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210820004536.15791-2-digetx@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent d9cf3bd5

include/linux/blkdev.h

+7 −0
Original line number Diff line number Diff line
@@ -1872,6 +1872,13 @@ struct block_device_operations { 
	char *(*devnode)(struct gendisk *disk, umode_t *mode);

	struct module *owner;

	const struct pr_ops *pr_ops;



	/*

	 * Special callback for probing GPT entry at a given sector.

	 * Needed by Android devices, used by GPT scanner and MMC blk

	 * driver.

	 */

	int (*alternative_gpt_sector)(struct gendisk *disk, sector_t *sector);

};



#ifdef CONFIG_COMPAT