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Date:   Thu, 10 Nov 2016 19:20:42 +0800
From:   kbuild test robot <lkp@...el.com>
To:     David Lebrun <david.lebrun@...ouvain.be>
Cc:     kbuild-all@...org, netdev@...r.kernel.org, lorenzo@...gle.com,
        davem@...emloft.net, David Lebrun <david.lebrun@...ouvain.be>
Subject: Re: [PATCH net-next] ipv6: sr: fix IPv6 initialization failure
 without lwtunnels

Hi David,

[auto build test ERROR on net-next/master]

url:    https://github.com/0day-ci/linux/commits/David-Lebrun/ipv6-sr-fix-IPv6-initialization-failure-without-lwtunnels/20161110-175753
config: i386-randconfig-s1-201645 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from net/ipv6/seg6_iptunnel.c:24:0:
   include/net/seg6.h: In function 'seg6_pernet':
   include/net/seg6.h:52:12: error: 'struct net' has no member named 'ipv6'; did you mean 'ipv4'?
     return net->ipv6.seg6_data;
               ^~
   net/ipv6/seg6_iptunnel.c: In function 'seg6_output':
>> net/ipv6/seg6_iptunnel.c:289:3: error: implicit declaration of function 'dst_cache_set_ip6' [-Werror=implicit-function-declaration]
      dst_cache_set_ip6(&slwt->cache, dst, &fl6.saddr);
      ^~~~~~~~~~~~~~~~~
   In file included from net/ipv6/seg6_iptunnel.c:24:0:
   include/net/seg6.h: In function 'seg6_pernet':
   include/net/seg6.h:53:1: warning: control reaches end of non-void function [-Wreturn-type]
    }
    ^
   cc1: some warnings being treated as errors

vim +/dst_cache_set_ip6 +289 net/ipv6/seg6_iptunnel.c

6c8702c6 David Lebrun 2016-11-08  273  		struct flowi6 fl6;
6c8702c6 David Lebrun 2016-11-08  274  
6c8702c6 David Lebrun 2016-11-08  275  		fl6.daddr = hdr->daddr;
6c8702c6 David Lebrun 2016-11-08  276  		fl6.saddr = hdr->saddr;
6c8702c6 David Lebrun 2016-11-08  277  		fl6.flowlabel = ip6_flowinfo(hdr);
6c8702c6 David Lebrun 2016-11-08  278  		fl6.flowi6_mark = skb->mark;
6c8702c6 David Lebrun 2016-11-08  279  		fl6.flowi6_proto = hdr->nexthdr;
6c8702c6 David Lebrun 2016-11-08  280  
6c8702c6 David Lebrun 2016-11-08  281  		dst = ip6_route_output(net, NULL, &fl6);
6c8702c6 David Lebrun 2016-11-08  282  		if (dst->error) {
6c8702c6 David Lebrun 2016-11-08  283  			err = dst->error;
6c8702c6 David Lebrun 2016-11-08  284  			dst_release(dst);
6c8702c6 David Lebrun 2016-11-08  285  			goto drop;
6c8702c6 David Lebrun 2016-11-08  286  		}
6c8702c6 David Lebrun 2016-11-08  287  
6c8702c6 David Lebrun 2016-11-08  288  #ifdef CONFIG_DST_CACHE
6c8702c6 David Lebrun 2016-11-08 @289  		dst_cache_set_ip6(&slwt->cache, dst, &fl6.saddr);
6c8702c6 David Lebrun 2016-11-08  290  #endif
6c8702c6 David Lebrun 2016-11-08  291  	}
6c8702c6 David Lebrun 2016-11-08  292  
6c8702c6 David Lebrun 2016-11-08  293  	skb_dst_drop(skb);
6c8702c6 David Lebrun 2016-11-08  294  	skb_dst_set(skb, dst);
6c8702c6 David Lebrun 2016-11-08  295  
6c8702c6 David Lebrun 2016-11-08  296  	return dst_output(net, sk, skb);
6c8702c6 David Lebrun 2016-11-08  297  drop:

:::::: The code at line 289 was first introduced by commit
:::::: 6c8702c60b88651072460f3f4026c7dfe2521d12 ipv6: sr: add support for SRH encapsulation and injection with lwtunnels

:::::: TO: David Lebrun <david.lebrun@...ouvain.be>
:::::: CC: David S. Miller <davem@...emloft.net>

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