Hi Kieran, I love your patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on tegra-drm/drm/tegra/for-next drm-tip/drm-tip pinchartl-media/drm/du/next v5.11-rc3 next-20210115] [cannot apply to linuxtv-media/master drm-exynos/exynos-drm-next drm/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/Kieran-Bingham/drm-rcar-du-Rewor... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: arm64-defconfig (attached as .config) compiler: aarch64-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/54bcb2a6860ae79fb060b013775d9184b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kieran-Bingham/drm-rcar-du-Rework-CRTC-and-groups-for-atomic-commits/20210115-112237 git checkout 54bcb2a6860ae79fb060b013775d9184b312103d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 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 >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org