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

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