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blk-mq: use blk_mq_rq_state() instead of testing REQ_ATOM_COMPLETE

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blk_mq_check_inflight() and blk_mq_poll_hybrid_sleep() test
REQ_ATOM_COMPLETE to determine the request state.  Both uses are
speculative and we can test REQ_ATOM_STARTED and blk_mq_rq_state() for
equivalent results.  Replace the tests.  This will allow removing
REQ_ATOM_COMPLETE usages from blk-mq.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tejun Heo
2018-01-09 08:29:49 -08:00
committed by Jens Axboe
parent 1d9bd5161b
commit 67818d2573
1 changed files with 3 additions and 3 deletions
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block/blk-mq.c
+3 -3
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@@ -95,8 +95,7 @@ static void blk_mq_check_inflight(struct blk_mq_hw_ctx *hctx,
{
struct mq_inflight *mi = priv;
if (test_bit(REQ_ATOM_STARTED, &rq->atomic_flags) &&
!test_bit(REQ_ATOM_COMPLETE, &rq->atomic_flags)) {
if (blk_mq_rq_state(rq) == MQ_RQ_IN_FLIGHT) {
/*
* index[0] counts the specific partition that was asked
* for. index[1] counts the ones that are active on the
@@ -3024,7 +3023,8 @@ static bool blk_mq_poll_hybrid_sleep(struct request_queue *q,
hrtimer_init_sleeper(&hs, current);
do {
if (test_bit(REQ_ATOM_COMPLETE, &rq->atomic_flags))
if (test_bit(REQ_ATOM_STARTED, &rq->atomic_flags) &&
blk_mq_rq_state(rq) != MQ_RQ_IN_FLIGHT)
break;
set_current_state(TASK_UNINTERRUPTIBLE);
hrtimer_start_expires(&hs.timer, mode);