linux-kernel - Re: [PATCH] lib/vsprintf: Remove redundant code

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Message-ID: <ZS/V7uS/7cGMpDJD@smile.fi.intel.com>
Date:   Wed, 18 Oct 2023 15:56:14 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     pmladek@...e.com, rostedt@...dmis.org, linux@...musvillemoes.dk,
        senozhatsky@...omium.org, linux-kernel@...r.kernel.org,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: Re: [PATCH] lib/vsprintf: Remove redundant code

On Wed, Oct 18, 2023 at 02:48:17PM +0800, Jiapeng Chong wrote:
> When variable needcolon is assigned a value of false, it must be
> assigned a value of true later on, which is redundant code.
> 
> lib/vsprintf.c:1411:4: warning: Value stored to 'needcolon' is never read.

...

> @@ -1406,10 +1406,9 @@ char *ip6_compressed_string(char *p, const char *addr)
>  			i += longest - 1;
>  			continue;
>  		}
> -		if (needcolon) {
> +		if (needcolon)
>  			*p++ = ':';
> -			needcolon = false;
> -		}
> +
>  		/* hex u16 without leading 0s */
>  		word = ntohs(in6.s6_addr16[i]);
>  		hi = word >> 8;

Logically you may remove then the assignment to true as well.

But I would double check if it's not a continue missing somewhere or so.

-- 
With Best Regards,
Andy Shevchenko