tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git to-build head: 5fd3eccb73a30251d944935959498ca308848a54 commit: 94128c7eff45bbd72b15dd67ff164f8e6b874a0c [25/41] qeth: use ndo_siocdevprivate config: s390-allyesconfig (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commi... git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git git fetch --no-tags arnd-playground to-build git checkout 94128c7eff45bbd72b15dd67ff164f8e6b874a0c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): 2072 | .do_ioctl = qeth_l3_do_ioctl, | ^~~~~~~~~~~~~~~~ drivers/s390/net/qeth_l3_main.c:2072:14: note: (near initialization for 'qeth_l3_discipline.do_ioctl') cc1: some warnings being treated as errors vim +2072 drivers/s390/net/qeth_l3_main.c c044dc2132d19d Eugene Crosser 2014-01-29 2065 50144f675363c3 Julian Wiedmann 2020-10-01 2066 const struct qeth_discipline qeth_l3_discipline = { 79a04e40f7f0e9 Ursula Braun 2017-06-06 2067 .devtype = &qeth_l3_devtype, c041f2d487654e Sebastian Ott 2012-05-15 2068 .setup = qeth_l3_probe_device, 4a71df50047f0d Frank Blaschka 2008-02-15 2069 .remove = qeth_l3_remove_device, 4a71df50047f0d Frank Blaschka 2008-02-15 2070 .set_online = qeth_l3_set_online, 4a71df50047f0d Frank Blaschka 2008-02-15 2071 .set_offline = qeth_l3_set_offline, 942d6984aa0cb3 Julian Wiedmann 2017-04-11 @2072 .do_ioctl = qeth_l3_do_ioctl, c044dc2132d19d Eugene Crosser 2014-01-29 2073 .control_event_handler = qeth_l3_control_event, 4a71df50047f0d Frank Blaschka 2008-02-15 2074 }; c041f2d487654e Sebastian Ott 2012-05-15 2075 EXPORT_SYMBOL_GPL(qeth_l3_discipline); 4a71df50047f0d Frank Blaschka 2008-02-15 2076 :::::: The code at line 2072 was first introduced by commit :::::: 942d6984aa0cb3974b99d302b566eaf0b8eccf54 s390/qeth: move common ioctl handling to core :::::: TO: Julian Wiedmann <jwi(a)linux.vnet.ibm.com&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org