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block: simplify part_to_disk

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Now that struct hd_struct has a block_device pointer use that to
find the disk.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-11-23 16:38:15 +01:00 committed by Jens Axboe
parent 37c3fc9abb
commit c64dc3bd87
1 changed files with 3 additions and 7 deletions
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10
include/linux/genhd.h
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@ -218,13 +218,9 @@ struct gendisk {
static inline struct gendisk *part_to_disk(struct hd_struct *part)
{
if (likely(part)) {
if (part->partno)
return dev_to_disk(part_to_dev(part)->parent);
else
return dev_to_disk(part_to_dev(part));
}
return NULL;
if (unlikely(!part))
return NULL;
return part->bdev->bd_disk;
}
static inline int disk_max_parts(struct gendisk *disk)