linux-kernel - Re: [PATCH] sysctl: Fix 'defined but not used' warning

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Message-Id: <201210051803.28848.arnd@arndb.de>
Date:	Fri, 5 Oct 2012 18:03:28 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Fabio Estevam <fabio.estevam@...escale.com>
Cc:	akpm@...ux-foundation.org, mingo@...nel.org,
	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl,
	festevam@...il.com
Subject: Re: [PATCH] sysctl: Fix 'defined but not used' warning

On Friday 05 October 2012, Fabio Estevam wrote:
> Since commit 4ae834f767(sched/numa: Implement NUMA home-node selection code)
> building a kernel with CONFIG_SMP disabled causes the following warning:
> 
> kernel/sysctl.c:259:12: warning: 'min_sched_tunable_scaling' defined but not used [-Wunused-variable]
> kernel/sysctl.c:260:12: warning: 'max_sched_tunable_scaling' defined but not used [-Wunused-variable]
> 
> Annotate theses variables as '__maybe_unused'.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam@...escale.com>

Acked-by: Arnd Bergmann <arnd@...db.de>

I noticed the same thing and had a different fix for it, but yours is better anyway.
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