[PATCH -next 1/4] block/rq_qos: move implementions of init/exit rq-qos apis to blk-rq-qos.c

[Yu Kuai]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

These init/exit rq-qos apis are super cold path, there is no need to
inline them to improve performance. This patch also prepare to use a
global mutex to protect these apis, move these implementions to
blk-rq-qos.c so that the global mutex won't be exposed. There are no
functional changes.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 block/blk-rq-qos.c | 59 +++++++++++++++++++++++++++++++++++++++++
 block/blk-rq-qos.h | 65 +++-------------------------------------------
 2 files changed, 62 insertions(+), 62 deletions(-)

diff --git a/block/blk-rq-qos.c b/block/blk-rq-qos.c
index 88f0fe7dcf54..b6ea40775b2a 100644
--- a/block/blk-rq-qos.c
+++ b/block/blk-rq-qos.c
@@ -286,6 +286,65 @@ void rq_qos_wait(struct rq_wait *rqw, void *private_data,
 	finish_wait(&rqw->wait, &data.wq);
 }
 
+int rq_qos_add(struct request_queue *q, struct rq_qos *rqos)
+{
+	/*
+	 * No IO can be in-flight when adding rqos, so freeze queue, which
+	 * is fine since we only support rq_qos for blk-mq queue.
+	 *
+	 * Reuse ->queue_lock for protecting against other concurrent
+	 * rq_qos adding/deleting
+	 */
+	blk_mq_freeze_queue(q);
+
+	spin_lock_irq(&q->queue_lock);
+	if (rq_qos_id(q, rqos->id))
+		goto ebusy;
+	rqos->next = q->rq_qos;
+	q->rq_qos = rqos;
+	spin_unlock_irq(&q->queue_lock);
+
+	blk_mq_unfreeze_queue(q);
+
+	if (rqos->ops->debugfs_attrs) {
+		mutex_lock(&q->debugfs_mutex);
+		blk_mq_debugfs_register_rqos(rqos);
+		mutex_unlock(&q->debugfs_mutex);
+	}
+
+	return 0;
+ebusy:
+	spin_unlock_irq(&q->queue_lock);
+	blk_mq_unfreeze_queue(q);
+	return -EBUSY;
+}
+
+void rq_qos_del(struct request_queue *q, struct rq_qos *rqos)
+{
+	struct rq_qos **cur;
+
+	/*
+	 * See comment in rq_qos_add() about freezing queue & using
+	 * ->queue_lock.
+	 */
+	blk_mq_freeze_queue(q);
+
+	spin_lock_irq(&q->queue_lock);
+	for (cur = &q->rq_qos; *cur; cur = &(*cur)->next) {
+		if (*cur == rqos) {
+			*cur = rqos->next;
+			break;
+		}
+	}
+	spin_unlock_irq(&q->queue_lock);
+
+	blk_mq_unfreeze_queue(q);
+
+	mutex_lock(&q->debugfs_mutex);
+	blk_mq_debugfs_unregister_rqos(rqos);
+	mutex_unlock(&q->debugfs_mutex);
+}
+
 void rq_qos_exit(struct request_queue *q)
 {
 	while (q->rq_qos) {
diff --git a/block/blk-rq-qos.h b/block/blk-rq-qos.h
index 1ef1f7d4bc3c..f2d95e19d7a8 100644
--- a/block/blk-rq-qos.h
+++ b/block/blk-rq-qos.h
@@ -85,69 +85,12 @@ static inline void rq_wait_init(struct rq_wait *rq_wait)
 	init_waitqueue_head(&rq_wait->wait);
 }
 
-static inline int rq_qos_add(struct request_queue *q, struct rq_qos *rqos)
-{
-	/*
-	 * No IO can be in-flight when adding rqos, so freeze queue, which
-	 * is fine since we only support rq_qos for blk-mq queue.
-	 *
-	 * Reuse ->queue_lock for protecting against other concurrent
-	 * rq_qos adding/deleting
-	 */
-	blk_mq_freeze_queue(q);
-
-	spin_lock_irq(&q->queue_lock);
-	if (rq_qos_id(q, rqos->id))
-		goto ebusy;
-	rqos->next = q->rq_qos;
-	q->rq_qos = rqos;
-	spin_unlock_irq(&q->queue_lock);
-
-	blk_mq_unfreeze_queue(q);
-
-	if (rqos->ops->debugfs_attrs) {
-		mutex_lock(&q->debugfs_mutex);
-		blk_mq_debugfs_register_rqos(rqos);
-		mutex_unlock(&q->debugfs_mutex);
-	}
-
-	return 0;
-ebusy:
-	spin_unlock_irq(&q->queue_lock);
-	blk_mq_unfreeze_queue(q);
-	return -EBUSY;
-
-}
-
-static inline void rq_qos_del(struct request_queue *q, struct rq_qos *rqos)
-{
-	struct rq_qos **cur;
-
-	/*
-	 * See comment in rq_qos_add() about freezing queue & using
-	 * ->queue_lock.
-	 */
-	blk_mq_freeze_queue(q);
-
-	spin_lock_irq(&q->queue_lock);
-	for (cur = &q->rq_qos; *cur; cur = &(*cur)->next) {
-		if (*cur == rqos) {
-			*cur = rqos->next;
-			break;
-		}
-	}
-	spin_unlock_irq(&q->queue_lock);
-
-	blk_mq_unfreeze_queue(q);
-
-	mutex_lock(&q->debugfs_mutex);
-	blk_mq_debugfs_unregister_rqos(rqos);
-	mutex_unlock(&q->debugfs_mutex);
-}
-
 typedef bool (acquire_inflight_cb_t)(struct rq_wait *rqw, void *private_data);
 typedef void (cleanup_cb_t)(struct rq_wait *rqw, void *private_data);
 
+int rq_qos_add(struct request_queue *q, struct rq_qos *rqos);
+void rq_qos_del(struct request_queue *q, struct rq_qos *rqos);
+void rq_qos_exit(struct request_queue *q);
 void rq_qos_wait(struct rq_wait *rqw, void *private_data,
 		 acquire_inflight_cb_t *acquire_inflight_cb,
 		 cleanup_cb_t *cleanup_cb);
@@ -230,6 +173,4 @@ static inline void rq_qos_queue_depth_changed(struct request_queue *q)
 		__rq_qos_queue_depth_changed(q->rq_qos);
 }
 
-void rq_qos_exit(struct request_queue *);
-
 #endif
-- 
2.31.1