netdev - Re: [PATCH 01/23] netfilter: nft_reject: fix compilation warning if NF_TABLES

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Date:	Fri, 10 Jan 2014 14:39:27 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	sergei.shtylyov@...entembedded.com
Cc:	pablo@...filter.org, netfilter-devel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH 01/23] netfilter: nft_reject: fix compilation warning
 if NF_TABLES_IPV6 is disabled

From: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Date: Fri, 10 Jan 2014 23:33:22 +0300

> Hello.
> 
> On 01/10/2014 03:35 AM, Pablo Neira Ayuso wrote:
> 
>> net/netfilter/nft_reject.c: In function 'nft_reject_eval':
>> net/netfilter/nft_reject.c:37:14: warning: unused variable 'net'
>> [-Wunused-variable]
> 
>> Reported-by: kbuild test robot <fengguang.wu@...el.com>
>> Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
>> ---
>>   net/netfilter/nft_reject.c |    3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
>> diff --git a/net/netfilter/nft_reject.c b/net/netfilter/nft_reject.c
>> index 0d690d4..7ae63cd 100644
>> --- a/net/netfilter/nft_reject.c
>> +++ b/net/netfilter/nft_reject.c
>> @@ -34,8 +34,9 @@ static void nft_reject_eval(const struct nft_expr
>> *expr,
>>   			      const struct nft_pktinfo *pkt)
>>   {
>>   	struct nft_reject *priv = nft_expr_priv(expr);
>> +#if IS_ENABLED(CONFIG_NF_TABLES_IPV6)
>>   	struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out);
>> -
> 
>    Why remove empty line after the declaration block?

Because "#endif" sort of serves the same purpose.

This is what I do too in this situation.
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