block: use ->bi_bdev for bio based I/O accounting

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Rework the I/O accounting for bio based drivers to use ->bi_bdev.  This
means all drivers can now simply use bio_start_io_acct to start
accounting, and it will take partitions into account automatically.  To
end I/O account either bio_end_io_acct can be used if the driver never
remaps I/O to a different device, or bio_end_io_acct_remapped if the
driver did remap the I/O.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2021-01-24 11:02:37 +01:00 • committed by Jens Axboe

parent 30c5d3456c

commit 99dfc43ecb

4 changed files with 42 additions and 44 deletions

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include/linux/blkdev.h

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