linux-kernel - Re: [PATCH] fs/ntfs3: remove redundant assignment to variable vcn

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Message-ID: <90e11a93-4f3a-2209-2bc2-acfb791b8ac0@gmail.com>
Date:   Wed, 20 Apr 2022 20:40:08 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Colin Ian King <colin.i.king@...il.com>,
        Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
        ntfs3@...ts.linux.dev
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH] fs/ntfs3: remove redundant assignment to variable vcn

On 18.4.2022 17.00, Colin Ian King wrote:
> Variable vcn is being assigned a value that is never read, it is
> being re-assigned again in the initialization of a for-loop.  The
> assignment is redundant and can be removed.
> 
> Cleans up clang scan build warning:
> fs/ntfs3/attrib.c:1176:7: warning: Value stored to 'vcn' during its
> initialization is never read [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>

Reviewed-by: Kari Argillander <kari.argillander@...il.com>

> ---
>   fs/ntfs3/attrib.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
> index e8c00dda42ad..fc0623b029e6 100644
> --- a/fs/ntfs3/attrib.c
> +++ b/fs/ntfs3/attrib.c
> @@ -1173,7 +1173,7 @@ int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type,
>   {
>   	struct ntfs_sb_info *sbi = ni->mi.sbi;
>   	u8 cluster_bits = sbi->cluster_bits;
> -	CLST vcn = from >> cluster_bits;
> +	CLST vcn;
>   	CLST vcn_last = (to - 1) >> cluster_bits;
>   	CLST lcn, clen;
>   	int err;