Hi Alexander, [auto build test ERROR on bluetooth-next/master] url: https://github.com/0day-ci/linux/commits/Alexander-Aring/6lowpan-introduce-basic-6lowpan-nd/20160418-191825 base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master config: i386-randconfig-a0-04181351 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): >> ERROR: "ipv6_get_lladdr" [net/6lowpan/6lowpan.ko] undefined! >> ERROR: "inet6_ifa_finish_destroy" [net/6lowpan/6lowpan.ko] undefined! >> ERROR: "rt6_clean_tohost" [net/6lowpan/6lowpan.ko] undefined! >> ERROR: "ipv6_chk_acast_addr" [net/6lowpan/6lowpan.ko] undefined! >> ERROR: "addrconf_dad_failure" [net/6lowpan/6lowpan.ko] undefined! --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation