Hi "Daniel, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on linuxtv-media/master] [also build test ERROR on next-20200501] [cannot apply to v5.7-rc3] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Daniel-W-S-Almeida/media-vidtv-implement-a-virtual-DVB-driver/20200502-115016 base: git://linuxtv.org/media_tree.git master config: m68k-allmodconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot Note: the linux-review/Daniel-W-S-Almeida/media-vidtv-implement-a-virtual-DVB-driver/20200502-115016 HEAD c4684802684965da146efe839d330a0a0ea5fc05 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): In file included from drivers/media/test-drivers/vidtv/vidtv_demod.c:21: >> drivers/media/test-drivers/vidtv/vidtv_demod.h:26:28: error: field 'config' has incomplete type 26 | struct vidtv_demod_config config; | ^~~~~~ vim +/config +26 drivers/media/test-drivers/vidtv/vidtv_demod.h cd617da9551829 Daniel W. S. Almeida 2020-05-02 23 cd617da9551829 Daniel W. S. Almeida 2020-05-02 24 struct vidtv_demod_state { cd617da9551829 Daniel W. S. Almeida 2020-05-02 25 struct dvb_frontend frontend; cd617da9551829 Daniel W. S. Almeida 2020-05-02 @26 struct vidtv_demod_config config; :::::: The code at line 26 was first introduced by commit :::::: cd617da9551829cc4a8a1e3d61c5221fd501a288 media: vidtv: implement a demodulator driver :::::: TO: Daniel W. S. Almeida :::::: CC: 0day robot --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org