Hi Abhinav, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on drm/drm-next] [also build test ERROR on drm-intel/for-linux-next drm-tip/drm-tip drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next v5.16 next-20220121] [cannot apply to airlied/drm-next] [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/Abhinav-Kumar/drm-allow-passing-... base: git://anongit.freedesktop.org/drm/drm drm-next config: hexagon-randconfig-r005-20220120 (https://download.01.org/0day-ci/archive/20220121/202201211623.L8JFrG3B-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d4baf3b1322b84816aa623d8e8cb45a49cb68b84) 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/ce1d81913d9146f6e753c39f41929266a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Abhinav-Kumar/drm-allow-passing-a-real-encoder-object-for-wb-connector/20220121-103231 git checkout ce1d81913d9146f6e753c39f41929266a5885f99 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/vkms/ 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 >>): vkmsdev->output.wb_connector.encoder.possible_crtcs = 1; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^ -> 1 error generated. vim +143 drivers/gpu/drm/vkms/vkms_writeback.c dbd9d80c1b2e03 Rodrigo Siqueira 2020-08-30 138 dbd9d80c1b2e03 Rodrigo Siqueira 2020-08-30 139 int vkms_enable_writeback_connector(struct vkms_device *vkmsdev) dbd9d80c1b2e03 Rodrigo Siqueira 2020-08-30 140 { dbd9d80c1b2e03 Rodrigo Siqueira 2020-08-30 141 struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector; dbd9d80c1b2e03 Rodrigo Siqueira 2020-08-30 142 dbd9d80c1b2e03 Rodrigo Siqueira 2020-08-30 @143 vkmsdev->output.wb_connector.encoder.possible_crtcs = 1; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org