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

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Message-ID: <SN6PR04MB4527248A7EC22784AE6C0836862A0@SN6PR04MB4527.namprd04.prod.outlook.com>
Date:   Sun, 14 Apr 2019 21:02:13 +0000
From:   Chaitanya Kulkarni <Chaitanya.Kulkarni@....com>
To:     Marcos Paulo de Souza <marcos.souza.org@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Jens Axboe <axboe@...nel.dk>,
        "open list:BLOCK LAYER" <linux-block@...r.kernel.org>
Subject: Re: [PATCH 2/3] blk-mq.c: Rework documention of blk_mq_init_sq_queue
 function

On 4/13/19 8:11 PM, Marcos Paulo de Souza wrote:
> 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.
> +/**
Is following line beyond 80 columns ?
> + * blk_mq_init_sq_queue - Create a new request queue with a SQ queue and tag set
It will be great if we describe what SQ in the above line, otherwise we 
stating just obvious here.
> + * @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,
>