[nf-next:for-net-next3 37/40] net/netfilter/xt_addrtype.c:55: undefined reference to `nf_ip6_route'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git 
for-net-next3
head:   dfbb1c16489ca1b93e3f8aebc74d9229f1d87cc6
commit: 4a61f6d1f4eddcb006e6d6ed1a90c81737c6dc0a [37/40] netfilter: remove 
route indirection in struct nf_afinfo
config: i386-randconfig-a1-12171902 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        git checkout 4a61f6d1f4eddcb006e6d6ed1a90c81737c6dc0a
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   net/netfilter/utils.o: In function `nf_checksum':
   net/netfilter/utils.c:18: undefined reference to `nf_ip6_checksum'
   net/netfilter/utils.o: In function `nf_checksum_partial':
   net/netfilter/utils.c:38: undefined reference to `nf_ip6_checksum_partial'
   net/netfilter/utils.o: In function `nf_saveroute':
   net/netfilter/utils.c:54: undefined reference to `nf_ip6_saveroute'
   net/netfilter/xt_addrtype.o: In function `match_lookup_rt6':
>> net/netfilter/xt_addrtype.c:55: undefined reference to `nf_ip6_route'
>> net/netfilter/xt_addrtype.c:55: undefined reference to `nf_ip6_route'

vim +55 net/netfilter/xt_addrtype.c

    34  
    35  #if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
    36  static u32 match_lookup_rt6(struct net *net, const struct net_device 
*dev,
    37                              const struct in6_addr *addr, u16 mask)
    38  {
    39          const struct nf_ipv6_ops *v6ops;
    40          struct flowi6 flow;
    41          struct rt6_info *rt;
    42          u32 ret = 0;
    43          int route_err;
    44  
    45          memset(&flow, 0, sizeof(flow));
    46          flow.daddr = *addr;
    47          if (dev)
    48                  flow.flowi6_oif = dev->ifindex;
    49  
    50          if (dev && (mask & XT_ADDRTYPE_LOCAL)) {
    51                  v6ops = nf_get_ipv6_ops();
    52                  if (v6ops && v6ops->chk_addr(net, addr, dev, true))
    53                          ret = XT_ADDRTYPE_LOCAL;
    54          }
  > 55          route_err = nf_ip6_route(net, (struct dst_entry **)&rt,
    56                                   flowi6_to_flowi(&flow), false);
    57          if (route_err)
    58                  return XT_ADDRTYPE_UNREACHABLE;
    59  
    60          if (rt->rt6i_flags & RTF_REJECT)
    61                  ret = XT_ADDRTYPE_UNREACHABLE;
    62  
    63          if (dev == NULL && rt->rt6i_flags & RTF_LOCAL)
    64                  ret |= XT_ADDRTYPE_LOCAL;
    65          if (ipv6_anycast_destination((struct dst_entry *)rt, addr))
    66                  ret |= XT_ADDRTYPE_ANYCAST;
    67  
    68          dst_release(&rt->dst);
    69          return ret;
    70  }
    71  

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