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

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Message-ID: <50C1C8C0.2020006@gmail.com>
Date:	Fri, 07 Dec 2012 18:45:20 +0800
From:	Shan Wei <shanwei88@...il.com>
To:	Cong Ding <dinggnu@...il.com>
CC:	"David S. Miller" <davem@...emloft.net>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Pavel Emelyanov <xemul@...allels.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: core: fix unused variable sparse warning

Cong Ding said, at 2012/12/7 8:15:
> 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.

It has been fixed yesterday.
see b93196dc5af7729ff7cc50d3d322ab1a364aa14f

> 
>>
>> Signed-off-by: Cong Ding <dinggnu@...il.com>
>> ---
>>  net/core/neighbour.c |    2 ++
>>  1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/net/core/neighbour.c b/net/core/neighbour.c
>> index 36fc692..4a15278 100644
>> --- a/net/core/neighbour.c
>> +++ b/net/core/neighbour.c
>> @@ -62,8 +62,10 @@ static void __neigh_notify(struct neighbour *n, int type, int flags);
>>  static void neigh_update_notify(struct neighbour *neigh);
>>  static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev);
>>  
>> +#ifdef CONFIG_SYSCTL
>>  static int zero;
>>  static int unres_qlen_max = INT_MAX / SKB_TRUESIZE(ETH_FRAME_LEN);
>> +#endif
>>  
>>  static struct neigh_table *neigh_tables;
>>  #ifdef CONFIG_PROC_FS
>> -- 
>> 1.7.4.5
>>
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