Hi Deepak, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on drm-exynos/exynos-drm-next] [also build test WARNING on tegra-drm/drm/tegra/for-next drm-tip/drm-tip linus/master v5.8-rc2 next-20200622] [cannot apply to drm-intel/for-linux-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 as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Deepak-Rawat/DRM-driver-for-hype... base: https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 1d4c87335d5236ea1f35937e1014980ba961ae34) 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 >>, old ones prefixed by <<): static const uint64_t hyperv_modifiers[] = { ^ 1 warning generated. vim +/hyperv_modifiers +695 drivers/gpu/drm/tiny/hyperv_drm.c 694 696 DRM_FORMAT_MOD_LINEAR, 697 DRM_FORMAT_MOD_INVALID 698 }; 699 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org