tree 0429d43fed6fcb41ab394987d423bc08a042e730
parent c98cb5bbdab10d187aff9b4e386210eb2332af96
author Jens Axboe <axboe@kernel.dk> 1635940029 -0600
committer Jens Axboe <axboe@kernel.dk> 1636089610 -0600

block: move queue enter logic into blk_mq_submit_bio()

Retain the old logic for the fops based submit, but for our internal
blk_mq_submit_bio(), move the queue entering logic into the core
function itself.

We need to be a bit careful if going into the scheduler, as a scheduler
or queue mappings can arbitrarily change before we have entered the queue.
Have the bio scheduler mapping do that separately, it's a very cheap
operation compared to actually doing merging locking and lookups.

Reviewed-by: Christoph Hellwig <hch@lst.de>
[axboe: update to check merge post submit_bio_checks() doing remap...]
Signed-off-by: Jens Axboe <axboe@kernel.dk>