linux-kernel - Re: [PATCH] ipv4/route: avoid unused-but-set-variable warning

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Date: Fri, 22 Mar 2024 13:26:11 +0000
From: Simon Horman <horms@...nel.org>
To: Arnd Bergmann <arnd@...nel.org>
Cc: "David S. Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Arnd Bergmann <arnd@...db.de>, Kunwu Chan <chentao@...inos.cn>,
	Joel Granados <joel.granados@...il.com>,
	Zhengchao Shao <shaozhengchao@...wei.com>,
	Wangyang Guo <wangyang.guo@...el.com>,
	Kyle Zeng <zengyhkyle@...il.com>,
	Beniamino Galvani <b.galvani@...il.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipv4/route: avoid unused-but-set-variable warning

On Fri, Mar 22, 2024 at 02:18:12PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The log_martians variable is only used in an #ifdef, causing a 'make W=1'
> warning with gcc:
> 
> net/ipv4/route.c: In function 'ip_rt_send_redirect':
> net/ipv4/route.c:880:13: error: variable 'log_martians' set but not used [-Werror=unused-but-set-variable]
> 
> Change the #ifdef to an equivalent IS_ENABLED() to let the compiler
> see where the variable is used.
> 
> Fixes: 30038fc61adf ("net: ip_rt_send_redirect() optimization")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

## Form letter - net-next-closed

(text from Jakub)

The merge window for v6.9 has begun and therefore net-next is closed
for new drivers, features, code refactoring and optimizations.
We are currently accepting bug fixes only.

Please repost when net-next reopens after March 25th.

RFC patches sent for review only are welcome at any time.

See: https://www.kernel.org/doc/html/next/process/maintainer-netdev.html#development-cycle
--
pw-bot: defer