linux-kernel - Re: [PATCH -next] btrfs: send: use list_move_tail instead of list_del/list_add

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Date:   Tue, 8 Jun 2021 13:16:21 +0800
From:   Anand Jain <anand.jain@...cle.com>
To:     Baokun Li <libaokun1@...wei.com>, linux-kernel@...r.kernel.org,
        Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>
Cc:     weiyongjun1@...wei.com, yuehaibing@...wei.com,
        yangjihong1@...wei.com, yukuai3@...wei.com,
        linux-btrfs@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Hulk Robot <hulkci@...wei.com>
Subject: Re: [PATCH -next] btrfs: send: use list_move_tail instead of
 list_del/list_add_tail

On 8/6/21 11:12 am, Baokun Li wrote:
> Using list_move_tail() instead of list_del() + list_add_tail().
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Baokun Li <libaokun1@...wei.com>
> ---
>   fs/btrfs/send.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
> index bd69db72acc5..a0e51b2416a1 100644
> --- a/fs/btrfs/send.c
> +++ b/fs/btrfs/send.c
> @@ -2083,8 +2083,7 @@ static struct name_cache_entry *name_cache_search(struct send_ctx *sctx,
>    */
>   static void name_cache_used(struct send_ctx *sctx, struct name_cache_entry *nce)
>   {
> -	list_del(&nce->list);
> -	list_add_tail(&nce->list, &sctx->name_cache_list);
> +	list_move_tail(&nce->list, &sctx->name_cache_list);
>   }


  Looks good.
  You can consider open-code name_cache_used() as there is only one user.

Thanks, Anand

>   /*
>