linux-kernel - Re: [PATCH] vboxsf: Remove redundant assignment to out

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Date:   Thu, 24 Feb 2022 15:29:25 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: Re: [PATCH] vboxsf: Remove redundant assignment to out_len

Hi,

On 2/24/22 11:48, Jiapeng Chong wrote:
> Clean up the following clang-w1 warning:
> 
> fs/vboxsf/utils.c:442:9: warning: variable 'out_len' set but not used
> [-Wunused-but-set-variable].
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>

This is not the correct fix out_len indeed is never read
anywhere in this function, so the correct fix is to
completely remove the out_len variable .

Regards,

Hans



> ---
>  fs/vboxsf/utils.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/fs/vboxsf/utils.c b/fs/vboxsf/utils.c
> index e1db0f3f7e5e..865fe5ddc993 100644
> --- a/fs/vboxsf/utils.c
> +++ b/fs/vboxsf/utils.c
> @@ -439,7 +439,7 @@ int vboxsf_nlscpy(struct vboxsf_sbi *sbi, char *name, size_t name_bound_len,
>  {
>  	const char *in;
>  	char *out;
> -	size_t out_len;
> +	size_t out_len = 0;
>  	size_t out_bound_len;
>  	size_t in_bound_len;
>  
> @@ -447,7 +447,6 @@ int vboxsf_nlscpy(struct vboxsf_sbi *sbi, char *name, size_t name_bound_len,
>  	in_bound_len = utf8_len;
>  
>  	out = name;
> -	out_len = 0;
>  	/* Reserve space for terminating 0 */
>  	out_bound_len = name_bound_len - 1;
>