block: add a disk_openers helper

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Add a helper that returns the openers for a given gendisk to avoid having
drivers poke into disk->part0 to get at this information in a somewhat
cumbersome way.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220330052917.2566582-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2022-03-30 07:29:06 +02:00 • committed by Jens Axboe

parent 7a86d6dc14

commit dbdc1be325

3 changed files with 19 additions and 4 deletions

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4

drivers/block/nbd.c

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4

drivers/block/zram/zram_drv.c

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15

include/linux/blkdev.h

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