linux-kernel - Re: [PATCH] mmc: core: remove issue

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Date:	Fri, 20 Sep 2013 09:33:06 +0200
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Grant Grundler <grundler@...omium.org>
Cc:	Chris Ball <cjb@...top.org>, Seungwon Jeon <tgih.jun@...sung.com>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: core: remove issue_fn indirect function call

On 19 September 2013 19:20, Grant Grundler <grundler@...omium.org> wrote:
> struct mmc_queue defines issue_fn as an indirect function call.
> issue_fn field only gets set to mmc_blk_issue_rq and only gets
> invoked immediately after calling blk_fetch_request().
> Don't bother with indirect function call - it's pointless and just
> obfuscates the code.
>
> Signed-off-by: Grant Grundler <grundler@...omium.org>

Acked-by: Ulf Hansson <ulf.hansson@...aro.org>

> ---
>  drivers/mmc/card/block.c | 1 -
>  drivers/mmc/card/queue.c | 2 +-
>  drivers/mmc/card/queue.h | 1 -
>  3 files changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
> index 1a3163f..b2cdd10 100644
> --- a/drivers/mmc/card/block.c
> +++ b/drivers/mmc/card/block.c
> @@ -2072,7 +2072,6 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
>         if (ret)
>                 goto err_putdisk;
>
> -       md->queue.issue_fn = mmc_blk_issue_rq;
>         md->queue.data = md;
>
>         md->disk->major = MMC_BLOCK_MAJOR;
> diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
> index fa9632e..6f9adc5 100644
> --- a/drivers/mmc/card/queue.c
> +++ b/drivers/mmc/card/queue.c
> @@ -67,7 +67,7 @@ static int mmc_queue_thread(void *d)
>                 if (req || mq->mqrq_prev->req) {
>                         set_current_state(TASK_RUNNING);
>                         cmd_flags = req ? req->cmd_flags : 0;
> -                       mq->issue_fn(mq, req);
> +                       mmc_blk_issue_rq(mq, req);
>                         if (mq->flags & MMC_QUEUE_NEW_REQUEST) {
>                                 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
>                                 continue; /* fetch again */
> diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
> index 5752d50..35380015 100644
> --- a/drivers/mmc/card/queue.h
> +++ b/drivers/mmc/card/queue.h
> @@ -51,7 +51,6 @@ struct mmc_queue {
>  #define MMC_QUEUE_SUSPENDED    (1 << 0)
>  #define MMC_QUEUE_NEW_REQUEST  (1 << 1)
>
> -       int                     (*issue_fn)(struct mmc_queue *, struct request *);
>         void                    *data;
>         struct request_queue    *queue;
>         struct mmc_queue_req    mqrq[2];
> --
> 1.8.4
>
> --
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