block: switch gendisk lookup to a simple xarray

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Now that bdev_map is only used for finding gendisks, we can use
a simple xarray instead of the regions tracking structure for it.

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

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Christoph Hellwig 2020-10-29 15:58:41 +01:00 • committed by Jens Axboe

parent 76487f0241

commit e418de3abc

2 changed files with 37 additions and 178 deletions

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206

block/genhd.c

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7

include/linux/genhd.h

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