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authorBart Van Assche <bvanassche@acm.org>2020-12-09 08:29:45 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2020-12-09 19:41:41 +0300
commit0854bcdcdec26aecdc92c303816f349ee1fba2bc (patch)
tree2d1d229327b5804dee5ac665d5c17b447d3b2ebe /block
parentfa4d0f1992a96f6d7c988ef423e3127e613f6ac9 (diff)
downloadlinux-0854bcdcdec26aecdc92c303816f349ee1fba2bc.tar.xz
scsi: block: Introduce BLK_MQ_REQ_PM
Introduce the BLK_MQ_REQ_PM flag. This flag makes the request allocation functions set RQF_PM. This is the first step towards removing BLK_MQ_REQ_PREEMPT. Link: https://lore.kernel.org/r/20201209052951.16136-3-bvanassche@acm.org Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Stanley Chu <stanley.chu@mediatek.com> Cc: Ming Lei <ming.lei@redhat.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Can Guo <cang@codeaurora.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Jens Axboe <axboe@kernel.dk> Reviewed-by: Can Guo <cang@codeaurora.org> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c7
-rw-r--r--block/blk-mq.c2
2 files changed, 6 insertions, 3 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 2db8bda43b6e..10696f9fb6ac 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -424,11 +424,11 @@ EXPORT_SYMBOL(blk_cleanup_queue);
/**
* blk_queue_enter() - try to increase q->q_usage_counter
* @q: request queue pointer
- * @flags: BLK_MQ_REQ_NOWAIT and/or BLK_MQ_REQ_PREEMPT
+ * @flags: BLK_MQ_REQ_NOWAIT, BLK_MQ_REQ_PM and/or BLK_MQ_REQ_PREEMPT
*/
int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
{
- const bool pm = flags & BLK_MQ_REQ_PREEMPT;
+ const bool pm = flags & (BLK_MQ_REQ_PM | BLK_MQ_REQ_PREEMPT);
while (true) {
bool success = false;
@@ -630,7 +630,8 @@ struct request *blk_get_request(struct request_queue *q, unsigned int op,
struct request *req;
WARN_ON_ONCE(op & REQ_NOWAIT);
- WARN_ON_ONCE(flags & ~(BLK_MQ_REQ_NOWAIT | BLK_MQ_REQ_PREEMPT));
+ WARN_ON_ONCE(flags & ~(BLK_MQ_REQ_NOWAIT | BLK_MQ_REQ_PM |
+ BLK_MQ_REQ_PREEMPT));
req = blk_mq_alloc_request(q, op, flags);
if (!IS_ERR(req) && q->mq_ops->initialize_rq_fn)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 1b25ec2fe9be..b5880a1fb38d 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -292,6 +292,8 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
rq->mq_hctx = data->hctx;
rq->rq_flags = 0;
rq->cmd_flags = data->cmd_flags;
+ if (data->flags & BLK_MQ_REQ_PM)
+ rq->rq_flags |= RQF_PM;
if (data->flags & BLK_MQ_REQ_PREEMPT)
rq->rq_flags |= RQF_PREEMPT;
if (blk_queue_io_stat(data->q))