From: Ming Lei <ming.lei@redhat.com>
Date: Fri, 3 Dec 2021 21:15:33 +0800
Subject: [PATCH] blk-mq: pass request queue to blk_mq_run_dispatch_ops
Git-commit: bcc330f42f442a98d61f153d16c0b6487461ee81
Patch-mainline: v5.17-rc1
References: jsc#PED-1183

We have switched to allocate srcu into request queue, so it is fine
to pass request queue to blk_mq_run_dispatch_ops().

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20211203131534.3668411-4-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 block/blk-mq.c | 9 +++++----
 block/blk-mq.h | 8 ++++----
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 6a2c2704454e..24c65bb8719b 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1925,7 +1925,8 @@ static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx)
 	 */
 	WARN_ON_ONCE(in_interrupt());
 
-	blk_mq_run_dispatch_ops(hctx, blk_mq_sched_dispatch_requests(hctx));
+	blk_mq_run_dispatch_ops(hctx->queue,
+			blk_mq_sched_dispatch_requests(hctx));
 }
 
 static inline int blk_mq_first_mapped_cpu(struct blk_mq_hw_ctx *hctx)
@@ -2047,7 +2048,7 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async)
 	 * And queue will be rerun in blk_mq_unquiesce_queue() if it is
 	 * quiesced.
 	 */
-	blk_mq_run_dispatch_ops(hctx,
+	blk_mq_run_dispatch_ops(hctx->queue,
 		need_run = !blk_queue_quiesced(hctx->queue) &&
 		blk_mq_hctx_has_pending(hctx));
 
@@ -2466,7 +2467,7 @@ static blk_status_t blk_mq_request_issue_directly(struct request *rq, bool last)
 	blk_status_t ret;
 	struct blk_mq_hw_ctx *hctx = rq->mq_hctx;
 
-	blk_mq_run_dispatch_ops(hctx,
+	blk_mq_run_dispatch_ops(rq->q,
 		ret = __blk_mq_try_issue_directly(hctx, rq, true, last));
 	return ret;
 }
@@ -2780,7 +2781,7 @@ void blk_mq_submit_bio(struct bio *bio)
 		  (q->nr_hw_queues == 1 || !is_sync)))
 		blk_mq_sched_insert_request(rq, false, true, true);
 	else
-		blk_mq_run_dispatch_ops(rq->mq_hctx,
+		blk_mq_run_dispatch_ops(rq->q,
 				blk_mq_try_issue_directly(rq->mq_hctx, rq));
 }
 
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 792f0b29c6eb..d62004e2d531 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -375,9 +375,9 @@ static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx,
 }
 
 /* run the code block in @dispatch_ops with rcu/srcu read lock held */
-#define blk_mq_run_dispatch_ops(hctx, dispatch_ops)		\
+#define blk_mq_run_dispatch_ops(q, dispatch_ops)		\
 do {								\
-	if (!((hctx)->flags & BLK_MQ_F_BLOCKING)) {		\
+	if (!blk_queue_has_srcu(q)) {				\
 		rcu_read_lock();				\
 		(dispatch_ops);					\
 		rcu_read_unlock();				\
@@ -385,9 +385,9 @@ do {								\
 		int srcu_idx;					\
 								\
 		might_sleep();					\
-		srcu_idx = srcu_read_lock((hctx)->queue->srcu);	\
+		srcu_idx = srcu_read_lock((q)->srcu);		\
 		(dispatch_ops);					\
-		srcu_read_unlock((hctx)->queue->srcu, srcu_idx); \
+		srcu_read_unlock((q)->srcu, srcu_idx);		\
 	}							\
 } while (0)
 
-- 
2.35.3