# \[PATCH v7 1/4\] block: Add alternative\_gpt\_sector() operation - From: Dmitry Osipenko \ - Date: 2021-08-20 00:45:47 - List: linux-block - Page: https://ratatoskr.run/linux-block/2021/08/6404875 - Thread: https://ratatoskr.run/linux-tegra/2021/08/6404874/t.md ```text 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: Christoph Hellwig Suggested-by: Christoph Hellwig Signed-off-by: Dmitry Osipenko --- include/linux/blkdev.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 111a3911c4d2..d65c8f60ad8e 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1850,6 +1850,13 @@ 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 -- 2.32.0 ```