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block: store a block_device pointer in struct bio

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Replace the gendisk pointer in struct bio with a pointer to the newly
improved struct block device.  From that the gendisk can be trivially
accessed with an extra indirection, but it also allows to directly
look up all information related to partition remapping.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2021-01-24 11:02:34 +01:00
committed by Jens Axboe
parent cf9a978f97
commit 309dca309f
55 changed files with 154 additions and 184 deletions
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5
include/linux/blkdev.h
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@@ -1967,7 +1967,8 @@ void part_end_io_acct(struct block_device *part, struct bio *bio,
*/
static inline unsigned long bio_start_io_acct(struct bio *bio)
{
return disk_start_io_acct(bio->bi_disk, bio_sectors(bio), bio_op(bio));
return disk_start_io_acct(bio->bi_bdev->bd_disk, bio_sectors(bio),
bio_op(bio));
}
/**
@@ -1977,7 +1978,7 @@ static inline unsigned long bio_start_io_acct(struct bio *bio)
*/
static inline void bio_end_io_acct(struct bio *bio, unsigned long start_time)
{
return disk_end_io_acct(bio->bi_disk, bio_op(bio), start_time);
return disk_end_io_acct(bio->bi_bdev->bd_disk, bio_op(bio), start_time);
}
int bdev_read_only(struct block_device *bdev);