linux-kernel - Re: [PATCH] ext4: remove redundant assignment to node

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Date:   Wed, 19 Jun 2019 13:13:57 +0200
From:   Jan Kara <jack@...e.cz>
To:     Colin King <colin.king@...onical.com>
Cc:     Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ext4: remove redundant assignment to node

On Wed 19-06-19 10:00:06, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Pointer 'node' is assigned a value that is never read, node is
> later overwritten when it re-assigned a different value inside
> the while-loop.  The assignment is redundant and can be removed.
> 
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Looks good to me. You can add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/ext4/extents_status.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
> index 023a3eb3afa3..7521de2dcf3a 100644
> --- a/fs/ext4/extents_status.c
> +++ b/fs/ext4/extents_status.c
> @@ -1317,7 +1317,6 @@ static int es_do_reclaim_extents(struct ext4_inode_info *ei, ext4_lblk_t end,
>  	es = __es_tree_search(&tree->root, ei->i_es_shrink_lblk);
>  	if (!es)
>  		goto out_wrap;
> -	node = &es->rb_node;
>  	while (*nr_to_scan > 0) {
>  		if (es->es_lblk > end) {
>  			ei->i_es_shrink_lblk = end + 1;
> -- 
> 2.20.1
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR