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block: change exported IO accounting interface from gendisk to bdev

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Export IO accounting interfaces in terms of block_device now that
gendisk has become more internal to block core.

Rename __part_{start,end}_io_acct's first argument from part to bdev.
Rename __part_{start,end}_io_acct to bdev_{start,end}_io_acct and
export them.  Remove disk_{start,end}_io_acct and update caller (zram)
to use bdev_{start,end}_io_acct.

DM can now be updated to use bdev_{start,end}_io_acct.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20220418022733.56168-2-snitzer@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei
2022-04-17 22:27:13 -04:00
committed by Jens Axboe
parent c22198e78d
commit 5f0614a55e
3 changed files with 27 additions and 37 deletions
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7
include/linux/blkdev.h
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@@ -1463,9 +1463,10 @@ static inline void blk_wake_io_task(struct task_struct *waiter)
wake_up_process(waiter);
}
unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors,
unsigned int op);
void disk_end_io_acct(struct gendisk *disk, unsigned int op,
unsigned long bdev_start_io_acct(struct block_device *bdev,
unsigned int sectors, unsigned int op,
unsigned long start_time);
void bdev_end_io_acct(struct block_device *bdev, unsigned int op,
unsigned long start_time);
void bio_start_io_acct_time(struct bio *bio, unsigned long start_time);