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

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Date:	Fri, 7 Dec 2012 02:26:39 +0000 (UTC)
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] net: core: fix unused variable sparse warning

On Fri, 07 Dec 2012 at 00:06 GMT, Cong Ding <dinggnu@...il.com> 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.
>

commit b93196dc5af7729ff7cc50d3d322ab1a364aa14f
Author: Cong Wang <amwang@...hat.com>
Date:   Thu Dec 6 10:04:04 2012 +0800

    net: fix some compiler warning in net/core/neighbour.c
        
    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]
    
    These variables are only used when CONFIG_SYSCTL is defined,
    so move them under #ifdef CONFIG_SYSCTL.
	        
    Reported-by: Fengguang Wu <fengguang.wu@...el.com>
    Signed-off-by: Cong Wang <amwang@...hat.com>
    Acked-by: Shan Wei <davidshan@...cent.com>
    Signed-off-by: David S. Miller <davem@...emloft.net>

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