Hi Daniel, I love your patch! Perhaps something to improve: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on drm-tip/drm-tip linus/master v5.8-rc5 next-20200717] [cannot apply to arm/drm-armada-devel arm/drm-armada-fixes] [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/Daniel-Vetter/drm-armada-Use-dev... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: x86_64-allyesconfig (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ed6b578040a85977026c93bf4188f996148f3218) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): static const struct drm_crtc_funcs arc_pgu_crtc_funcs = { ^ 1 warning generated. vim +/arc_pgu_crtc_funcs +137 drivers/gpu/drm/tiny/arcpgu.c bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 136 bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 @137 static const struct drm_crtc_funcs arc_pgu_crtc_funcs = { bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 138 .destroy = drm_crtc_cleanup, bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 139 .set_config = drm_atomic_helper_set_config, bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 140 .page_flip = drm_atomic_helper_page_flip, bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 141 .reset = drm_atomic_helper_crtc_reset, bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 142 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 143 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 144 }; bdae5c29d72870d drivers/gpu/drm/arc/arcpgu_drv.c Daniel Vetter 2020-07-17 145 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org