Hi John,

[auto build test results on v4.3-rc3 -- if it's inappropriate base, please 
ignore]

config: x86_64-randconfig-s2-10010927 (attached as .config)
reproduce:
        git checkout c1211d3ada9fc6f89f657c1d9c870de3baff506e
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   drivers/net/geneve.c: In function 'geneve_rx':
>> drivers/net/geneve.c:185:3: error: 'ip6h' undeclared (first use in this 
>> function)
      ip6h = ipv6_hdr(skb); /* outer IPv6 header... */
      ^
   drivers/net/geneve.c:185:3: note: each undeclared identifier is reported 
only once for each function it appears in
>> drivers/net/geneve.c:189:4: error: 'addr6' undeclared (first use in this 
>> function)
       addr6 = zero_addr6;
       ^
>> drivers/net/geneve.c:189:12: error: 'zero_addr6' undeclared (first use in 
>> this function)
       addr6 = zero_addr6;
               ^
>> drivers/net/geneve.c:196:12: error: implicit declaration of function 
>> 'geneve6_lookup' [-Werror=implicit-function-declaration]
      geneve = geneve6_lookup(gs, addr6, vni);
               ^
   cc1: some warnings being treated as errors

vim +/ip6h +185 drivers/net/geneve.c

   179  
   180                          addr = iph->saddr;
   181                  }
   182  
   183                  geneve = geneve_lookup(gs, addr, vni);
   184          } else if (sa_family == AF_INET6) {
 > 185                  ip6h = ipv6_hdr(skb); /* outer IPv6 header... */
   186  
   187                  if (gs->collect_md) {
   188                          vni = zero_vni;
 > 189                          addr6 = zero_addr6;
   190                  } else {
   191                          vni = gnvh->vni;
   192  
   193                          addr6 = ip6h->saddr;
   194                  }
   195  
 > 196                  geneve = geneve6_lookup(gs, addr6, vni);
   197          }
   198          if (!geneve)
   199                  goto drop;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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