linux-kernel - Re: [PATCH] ubi: fastmap: clean up the initialization of pointer p

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Date:   Mon, 30 Oct 2017 09:28:58 +0100
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Artem Bityutskiy <dedekind1@...il.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        linux-mtd@...ts.infradead.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ubi: fastmap: clean up the initialization of pointer p

On Sun, 29 Oct 2017 13:14:26 +0000
Colin King <colin.king@...onical.com> wrote:

> From: Colin Ian King <colin.king@...onical.com>
> 
> The pointer p is being initialized with one value and a few lines
> later being set to a newer replacement value. Clean up the code by
> using the latter assignment to p as the initial value. Cleans up
> clang warning:
> 
> drivers/mtd/ubi/fastmap.c:217:19: warning: Value stored to 'p'
> during its initialization is never read
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Reviewed-by: Boris Brezillon <boris.brezillon@...e-electrons.com>

> ---
>  drivers/mtd/ubi/fastmap.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
> index 5a832bc79b1b..9be4b94e83ad 100644
> --- a/drivers/mtd/ubi/fastmap.c
> +++ b/drivers/mtd/ubi/fastmap.c
> @@ -214,9 +214,8 @@ static void assign_aeb_to_av(struct ubi_attach_info *ai,
>  			     struct ubi_ainf_volume *av)
>  {
>  	struct ubi_ainf_peb *tmp_aeb;
> -	struct rb_node **p = &ai->volumes.rb_node, *parent = NULL;
> +	struct rb_node **p = &av->root.rb_node, *parent = NULL;
>  
> -	p = &av->root.rb_node;
>  	while (*p) {
>  		parent = *p;
>