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

From: Cong Wang <[email-masked]>
Date: Fri, 7 Dec 2012 02:26:39 +0000 (UTC)

On Fri, 07 Dec 2012 at 00:06 GMT, Cong Ding <[email-masked]> 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 <[email-masked]>
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 <[email-masked]>
    Signed-off-by: Cong Wang <[email-masked]>
    Acked-by: Shan Wei <[email-masked]>
    Signed-off-by: David S. Miller <[email-masked]>