linux-kernel - [PATCH 2/3] blk-mq.c: Rework documention of blk_mq_init_sq

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Date:   Sun, 14 Apr 2019 00:10:53 -0300
From:   Marcos Paulo de Souza <marcos.souza.org@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Marcos Paulo de Souza <marcos.souza.org@...il.com>,
        Jens Axboe <axboe@...nel.dk>,
        linux-block@...r.kernel.org (open list:BLOCK LAYER)
Subject: [PATCH 2/3] blk-mq.c: Rework documention of blk_mq_init_sq_queue function

Describing better what the function does, and what the arguments are
meant for.

Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@...il.com>
---
 block/blk-mq.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 4a8277a54c03..fd0bf89b8a73 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2675,9 +2675,20 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
 }
 EXPORT_SYMBOL(blk_mq_init_queue);
 
-/*
- * Helper for setting up a queue with mq ops, given queue depth, and
- * the passed in mq ops flags.
+/**
+ * blk_mq_init_sq_queue - Create a new request queue with a SQ queue and tag set
+ * @set: tag set to be associated by the newly created request queue
+ * @ops: operations to be associated with @set
+ * @queue_depth: number of tags of @set
+ * @set_flags: flags of @set
+ *
+ * Description:
+ * @set is initialized using @ops, @queue_depth, @set_flags, and using only one
+ * hw_queue (SQ). Later on blk_mq_alloc_tag_set() is called to validate and/or
+ * adjust values of the tag set. blk_mq_init_queue() is called passing @set as
+ * argument, returning a new request queue with @set associated.
+ *
+ * Returns the newly created request queue on success, or ERR_PTR() on failure.
  */
 struct request_queue *blk_mq_init_sq_queue(struct blk_mq_tag_set *set,
 					   const struct blk_mq_ops *ops,
-- 
2.16.4