block: Add a new helper to attempt to merge a bio

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There are lots of duplicated code when trying to merge a bio from
plug list and sw queue, we can introduce a new helper to attempt
to merge a bio, which can simplify the blk_bio_list_merge()
and blk_attempt_plug_merge().

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Baolin Wang 2020-08-28 10:52:56 +08:00 • committed by Jens Axboe

parent bdc6a287bc

commit 7d7ca7c526

3 changed files with 71 additions and 60 deletions

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104

block/blk-merge.c

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6

block/blk-mq-sched.c

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21

block/blk.h

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