Hi Hans, I love your patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on drm-tip/drm-tip linus/master v5.12-rc7 next-20210414] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Hans-de-Goede/drm-Add-privacy-sc... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: xtensa-randconfig-r003-20210414 (attached as .config) compiler: xtensa-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://github.com/0day-ci/linux/commit/8cb16e16d419f6ea9da13b9826a2d1d7a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Hans-de-Goede/drm-Add-privacy-screen-class-and-connector-properties/20210414-231316 git checkout 8cb16e16d419f6ea9da13b9826a2d1d7ad5a9819 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=xtensa 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 >>): xtensa-linux-ld: drivers/gpu/drm/drm_connector.o: in function `drm_connector_free': drm_connector.c:(.text+0x34): undefined reference to `drm_privacy_screen_get_state' xtensa-linux-ld: drivers/gpu/drm/drm_connector.o: in function `drm_connector_update_privacy_screen_properties': drm_connector.c:(.text+0x52): undefined reference to `drm_privacy_screen_get_state' xtensa-linux-ld: drivers/gpu/drm/drm_connector.o: in function `drm_connector_has_possible_encoder': drm_connector.c:(.text+0x448): undefined reference to `drm_privacy_screen_register_notifier' xtensa-linux-ld: drivers/gpu/drm/drm_connector.o: in function `drm_connector_register': drm_connector.c:(.text+0x4e0): undefined reference to `drm_privacy_screen_register_notifier' xtensa-linux-ld: drivers/gpu/drm/drm_connector.o: in function `drm_connector_unregister': drm_connector.c:(.text+0x53b): undefined reference to `drm_privacy_screen_unregister_notifier' xtensa-linux-ld: drivers/gpu/drm/drm_connector.o: in function `drm_connector_cleanup': drm_connector.c:(.text+0x5c3): undefined reference to `drm_privacy_screen_put' xtensa-linux-ld: drivers/gpu/drm/drm_connector.o: in function `drm_connector_attach_privacy_screen_provider': drm_connector.c:(.text+0x1afc): undefined reference to `drm_privacy_screen_set_sw_state' xtensa-linux-ld: drivers/gpu/drm/drm_connector.o: in function `drm_connector_update_privacy_screen': drm_connector.c:(.text+0x1b3a): undefined reference to `drm_privacy_screen_set_sw_state' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org