linux-kernel - Re: [PATCH] printk: remove obsolete dead assignment

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Date:   Tue, 8 Dec 2020 17:00:31 +0100
From:   Petr Mladek <pmladek@...e.com>
To:     Lukas Bulwahn <lukas.bulwahn@...il.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        John Ogness <john.ogness@...utronix.de>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        kernel-janitors@...r.kernel.org, linux-safety@...ts.elisa.tech
Subject: Re: [PATCH] printk: remove obsolete dead assignment

On Mon 2020-11-30 13:49:15, Lukas Bulwahn wrote:
> Commit 849f3127bb46 ("switch /dev/kmsg to ->write_iter()") refactored
> devkmsg_write() and left over a dead assignment on the variable 'len'.
> 
> Hence, make clang-analyzer warns:
> 
>   kernel/printk/printk.c:744:4: warning: Value stored to 'len' is never read
>     [clang-analyzer-deadcode.DeadStores]
>                           len -= endp - line;
>                           ^
> 
> Simply remove this obsolete dead assignment here.
> 
> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>

The patch is committed in printk/linux.git, branch for-5.11.

Best Regards,
Petr