Hi Jiri,

It's probably a bug fix that unveils the link errors.

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head:   20a17bf6c04e3eca8824c930ecc55ab832558e3b
commit: 751a587ac9f9a8bf314590fbac32d9e418060c5a [300/401] route: fix breakage after moving lwtunnel state
config: i386-randconfig-h0-09021408 (attached as .config)
reproduce:
  git checkout 751a587ac9f9a8bf314590fbac32d9e418060c5a
  # save the attached .config to linux build tree
  make ARCH=i386 

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

   net/built-in.o: In function `ipv4_conntrack_defrag':
   nf_defrag_ipv4.c:(.text+0x8e209): undefined reference to `nf_ct_zone_dflt'
   nf_defrag_ipv4.c:(.text+0x8e21c): undefined reference to `nf_ct_zone_dflt'
   nf_defrag_ipv4.c:(.text+0x8e2cb): undefined reference to `nf_ct_zone_dflt'
   net/built-in.o: In function `ipv6_defrag':
>> nf_defrag_ipv6_hooks.c:(.text+0xdb825): undefined reference to `nf_ct_zone_dflt'
   nf_defrag_ipv6_hooks.c:(.text+0xdb846): undefined reference to `nf_ct_zone_dflt'
   net/built-in.o:nf_defrag_ipv6_hooks.c:(.text+0xdb8ff): more undefined references to `nf_ct_zone_dflt' follow

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