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blk-mq: factor out a blk_rq_init_flush helper

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Factor out a helper from blk_insert_flush that initializes the flush
machine related fields in struct request, and don't bother with the
full memset as there's just a few fields to initialize, and all but
one already have explicit initializers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230519044050.107790-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-05-19 06:40:44 +02:00 committed by Jens Axboe
parent bda2795a63
commit 0b573692f1
1 changed files with 10 additions and 7 deletions
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17
block/blk-flush.c
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@ -376,6 +376,15 @@ static enum rq_end_io_ret mq_flush_data_end_io(struct request *rq,
return RQ_END_IO_NONE;
}
static void blk_rq_init_flush(struct request *rq)
{
rq->flush.seq = 0;
INIT_LIST_HEAD(&rq->flush.list);
rq->rq_flags |= RQF_FLUSH_SEQ;
rq->flush.saved_end_io = rq->end_io; /* Usually NULL */
rq->end_io = mq_flush_data_end_io;
}
/**
* blk_insert_flush - insert a new PREFLUSH/FUA request
* @rq: request to insert
@ -437,13 +446,7 @@ void blk_insert_flush(struct request *rq)
* @rq should go through flush machinery. Mark it part of flush
* sequence and submit for further processing.
*/
memset(&rq->flush, 0, sizeof(rq->flush));
INIT_LIST_HEAD(&rq->flush.list);
rq->rq_flags |= RQF_FLUSH_SEQ;
rq->flush.saved_end_io = rq->end_io; /* Usually NULL */
rq->end_io = mq_flush_data_end_io;
blk_rq_init_flush(rq);
spin_lock_irq(&fq->mq_flush_lock);
blk_flush_complete_seq(rq, fq, REQ_FSEQ_ACTIONS & ~policy, 0);
spin_unlock_irq(&fq->mq_flush_lock);