block: add an optional probe callback to major_names

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Add a callback to the major_names array that allows a driver to override
how to probe for dev_t that doesn't currently have a gendisk registered.
This will help separating the lookup of the gendisk by dev_t vs probe
action for a not currently registered dev_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2020-10-29 15:58:28 +01:00 • committed by Jens Axboe

parent bd8eff3ba2

commit a160c6159d

2 changed files with 22 additions and 4 deletions

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21

block/genhd.c

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5

include/linux/genhd.h

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