linux-ext4 - Re: [PATCH][next][V2] ext2: remove redundant assignment to variable desc and variable best

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Date:   Mon, 3 Jul 2023 14:45:12 +0200
From:   Jan Kara <jack@...e.cz>
To:     Colin Ian King <colin.i.king@...il.com>
Cc:     Jan Kara <jack@...e.com>, linux-ext4@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next][V2] ext2: remove redundant assignment to variable
 desc and variable best_desc

On Fri 30-06-23 17:54:58, Colin Ian King wrote:
> Variable desc is being assigned a value that is never read, the exit
> via label found immeditely returns with no access to desc. The
> assignment is redundant and can be removed. Also remove variable best_desc
> since this is not used. Cleans up clang scan muild warning:
> 
> fs/ext2/ialloc.c:297:4: warning: Value stored to 'desc' is never
> read [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>

Thanks, I've added the patch to my tree.

								Honza

> ---
> 
> V2: Also remove best_desc. Kudos to Dan Carpenter for spottin this extra
>     janitorial cleanup.
> 
> ---
>  fs/ext2/ialloc.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
> index a4e1d7a9c544..34cd5dc1da23 100644
> --- a/fs/ext2/ialloc.c
> +++ b/fs/ext2/ialloc.c
> @@ -273,7 +273,6 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
>  
>  	if ((parent == d_inode(sb->s_root)) ||
>  	    (EXT2_I(parent)->i_flags & EXT2_TOPDIR_FL)) {
> -		struct ext2_group_desc *best_desc = NULL;
>  		int best_ndir = inodes_per_group;
>  		int best_group = -1;
>  
> @@ -291,10 +290,8 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
>  				continue;
>  			best_group = group;
>  			best_ndir = le16_to_cpu(desc->bg_used_dirs_count);
> -			best_desc = desc;
>  		}
>  		if (best_group >= 0) {
> -			desc = best_desc;
>  			group = best_group;
>  			goto found;
>  		}
> -- 
> 2.39.2
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR