linux-kernel - Re: [PATCH v3 5/5] elevator: remove redundant code in elv_unregister

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Date:   Thu, 22 Sep 2022 20:37:08 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Yu Kuai <yukuai3@...wei.com>
Cc:     jack@...e.cz, paolo.valente@...aro.org, axboe@...nel.dk,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        yukuai1@...weicloud.com, yi.zhang@...wei.com
Subject: Re: [PATCH v3 5/5] elevator: remove redundant code in
 elv_unregister_queue()

On Thu, Sep 22, 2022 at 07:35:58PM +0800, Yu Kuai wrote:
> "elevator_queue *e" is already declared and initialized in the beginning
> of elv_unregister_queue().
> 
> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> ---
>  block/elevator.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/block/elevator.c b/block/elevator.c
> index 7cb61820cfa0..0a72d6fbbdcc 100644
> --- a/block/elevator.c
> +++ b/block/elevator.c
> @@ -524,8 +524,6 @@ void elv_unregister_queue(struct request_queue *q)
>  	lockdep_assert_held(&q->sysfs_lock);
>  
>  	if (e && test_and_clear_bit(ELEVATOR_FLAG_REGISTERED, &e->flags)) {
> -		struct elevator_queue *e = q->elevator;
> -
>  		kobject_uevent(&e->kobj, KOBJ_REMOVE);
>  		kobject_del(&e->kobj);
>  	}
> -- 

Reviewed-by: Eric Biggers <ebiggers@...gle.com>

- Eric