netdev - Re: [PATCH] net: core: fix unused variable sparse warning

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Message-Id: <20121206.222556.600775306911649606.davem@davemloft.net>
Date:	Thu, 06 Dec 2012 22:25:56 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	dinggnu@...il.com
Cc:	ebiederm@...ssion.com, edumazet@...gle.com, xemul@...allels.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: core: fix unused variable sparse warning

From: Cong Ding <dinggnu@...il.com>
Date: Fri, 7 Dec 2012 00:15:47 +0000

> On Fri, Dec 07, 2012 at 12:06:44AM +0000, Cong Ding wrote:
>> the variables zero and unres_qlen_max are only used when CONFIG_SYSCTL is
>> defined, otherwise it causes the following sparse warning when we turn on
>> CONFIG_SYSCTL.
> sorry for disturbing again, the sparse warning is
> net/core/neighbour.c:65:12: warning: ‘zero’ defined but not used [-Wunused-variable]
> net/core/neighbour.c:66:12: warning: ‘unres_qlen_max’ defined but not used [-Wunused-variable]
> 
> it happens if we turn off CONFIG_SYSCTL.

A patch for this has already in my tree for nearly a whole day.