On Thu, Oct 27, 2016 at 6:51 AM, Bart Van Assche
<bart.vanass...@sandisk.com> wrote:
> Multiple functions test the BLK_MQ_S_STOPPED bit so introduce
> a helper function that performs this test.
>
> Signed-off-by: Bart Van Assche <bart.vanass...@sandisk.com>
> Cc: Christoph Hellwig <h...@lst.de>
> Cc: Hannes Reinecke <h...@suse.com>
> Cc: Sagi Grimberg <s...@grimberg.me>
> Cc: Johannes Thumshirn <jthumsh...@suse.de>
Reviewed-by: Ming Lei <tom.leim...@gmail.com>
> ---
> block/blk-mq.c | 12 ++++++------
> block/blk-mq.h | 5 +++++
> 2 files changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/block/blk-mq.c b/block/blk-mq.c
> index b5dcafb..b52b3a6 100644
> --- a/block/blk-mq.c
> +++ b/block/blk-mq.c
> @@ -787,7 +787,7 @@ static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx
> *hctx)
> struct list_head *dptr;
> int queued;
>
> - if (unlikely(test_bit(BLK_MQ_S_STOPPED, &hctx->state)))
> + if (unlikely(blk_mq_hctx_stopped(hctx)))
> return;
>
> WARN_ON(!cpumask_test_cpu(raw_smp_processor_id(), hctx->cpumask) &&
> @@ -912,8 +912,8 @@ static int blk_mq_hctx_next_cpu(struct blk_mq_hw_ctx
> *hctx)
>
> void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async)
> {
> - if (unlikely(test_bit(BLK_MQ_S_STOPPED, &hctx->state) ||
> - !blk_mq_hw_queue_mapped(hctx)))
> + if (unlikely(blk_mq_hctx_stopped(hctx) ||
> + !blk_mq_hw_queue_mapped(hctx)))
> return;
>
> if (!async && !(hctx->flags & BLK_MQ_F_BLOCKING)) {
> @@ -938,7 +938,7 @@ void blk_mq_run_hw_queues(struct request_queue *q, bool
> async)
> queue_for_each_hw_ctx(q, hctx, i) {
> if ((!blk_mq_hctx_has_pending(hctx) &&
> list_empty_careful(&hctx->dispatch)) ||
> - test_bit(BLK_MQ_S_STOPPED, &hctx->state))
> + blk_mq_hctx_stopped(hctx))
> continue;
>
> blk_mq_run_hw_queue(hctx, async);
> @@ -988,7 +988,7 @@ void blk_mq_start_stopped_hw_queues(struct request_queue
> *q, bool async)
> int i;
>
> queue_for_each_hw_ctx(q, hctx, i) {
> - if (!test_bit(BLK_MQ_S_STOPPED, &hctx->state))
> + if (!blk_mq_hctx_stopped(hctx))
> continue;
>
> clear_bit(BLK_MQ_S_STOPPED, &hctx->state);
> @@ -1332,7 +1332,7 @@ static blk_qc_t blk_mq_make_request(struct
> request_queue *q, struct bio *bio)
> blk_mq_put_ctx(data.ctx);
> if (!old_rq)
> goto done;
> - if (test_bit(BLK_MQ_S_STOPPED, &data.hctx->state) ||
> + if (blk_mq_hctx_stopped(data.hctx) ||
> blk_mq_direct_issue_request(old_rq, &cookie) != 0)
> blk_mq_insert_request(old_rq, false, true, true);
> goto done;
> diff --git a/block/blk-mq.h b/block/blk-mq.h
> index e5d2524..ac772da 100644
> --- a/block/blk-mq.h
> +++ b/block/blk-mq.h
> @@ -100,6 +100,11 @@ static inline void blk_mq_set_alloc_data(struct
> blk_mq_alloc_data *data,
> data->hctx = hctx;
> }
>
> +static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx)
> +{
> + return test_bit(BLK_MQ_S_STOPPED, &hctx->state);
> +}
> +
> static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx)
> {
> return hctx->nr_ctx && hctx->tags;
> --
> 2.10.1
>
--
Ming Lei
--
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