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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-06-20 11:15:43 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-20 19:27:14 -0600 |
| commit | c3a148d20affcc334348402865169a61000d3905 (patch) | |
| tree | 62212e8c99043deb1ab66785211ddb87408fab2d /block/blk-mq.c | |
| parent | c8d9cf22cf0f89d1249a57ade5a1949c62075ce6 (diff) | |
| download | lwn-c3a148d20affcc334348402865169a61000d3905.tar.gz lwn-c3a148d20affcc334348402865169a61000d3905.zip | |
blk-mq: Initialize .rq_flags in blk_mq_rq_ctx_init()
Initialization of blk-mq requests is a bit weird: blk_mq_rq_ctx_init()
is called after a value has been assigned to .rq_flags and .rq_flags
is initialized in __blk_mq_finish_request(). Initialize .rq_flags in
blk_mq_rq_ctx_init() instead of relying on __blk_mq_finish_request().
Moving the initialization of .rq_flags is fine because all changes
and tests of .rq_flags occur between blk_get_request() and finishing
a request.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 2d21fbccc3a5..6268380c680f 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -228,6 +228,8 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, struct blk_mq_tags *tags = blk_mq_tags_from_data(data); struct request *rq = tags->static_rqs[tag]; + rq->rq_flags = 0; + if (data->flags & BLK_MQ_REQ_INTERNAL) { rq->tag = -1; rq->internal_tag = tag; @@ -423,7 +425,6 @@ void blk_mq_free_request(struct request *rq) atomic_dec(&hctx->nr_active); wbt_done(q->rq_wb, &rq->issue_stat); - rq->rq_flags = 0; clear_bit(REQ_ATOM_STARTED, &rq->atomic_flags); clear_bit(REQ_ATOM_POLL_SLEPT, &rq->atomic_flags); |