linux-kernel - Re: [PATCH] ocfs2: remove redundant assignment to variable free

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Message-ID: <dc5c3f04-b13f-6c32-9836-8d9f9783b81f@linux.alibaba.com>
Date:   Thu, 13 Jan 2022 10:18:12 +0800
From:   Joseph Qi <joseph.qi@...ux.alibaba.com>
To:     Colin Ian King <colin.i.king@...il.com>,
        Mark Fasheh <mark@...heh.com>,
        Joel Becker <jlbec@...lplan.org>, ocfs2-devel@....oracle.com,
        akpm <akpm@...ux-foundation.org>
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ocfs2: remove redundant assignment to variable free_space



On 1/13/22 7:04 AM, Colin Ian King wrote:
> Variable free_space is being initialized with a value that is not read,
> it is being re-assigned later in the two paths of an if statement. The
> early initialization is redundant and can be removed.
> 
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>

Acked-by: Joseph Qi <joseph.qi@...ux.alibaba.com>
> ---
>  fs/ocfs2/dir.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
> index bd8d534f11cb..f2cc1ff29e6d 100644
> --- a/fs/ocfs2/dir.c
> +++ b/fs/ocfs2/dir.c
> @@ -3343,7 +3343,7 @@ static int ocfs2_find_dir_space_id(struct inode *dir, struct buffer_head *di_bh,
>  	struct ocfs2_dir_entry *de, *last_de = NULL;
>  	char *de_buf, *limit;
>  	unsigned long offset = 0;
> -	unsigned int rec_len, new_rec_len, free_space = dir->i_sb->s_blocksize;
> +	unsigned int rec_len, new_rec_len, free_space;
>  
>  	/*
>  	 * This calculates how many free bytes we'd have in block zero, should