Hi Yong, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on drm/drm-next] [also build test ERROR on tegra-drm/drm/tegra/for-next drm-exynos/exynos-drm-next shawnguo/for-next rockchip/for-next sunxi/sunxi/for-next linus/master v5.17-rc1 next-20220128] [cannot apply to rmk-arm/drm-armada-devel rmk-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/Yong-Wu/component-Add-common-helpers-for-compare-release-functions/20220128-161211 base: git://anongit.freedesktop.org/drm/drm drm-next config: arc-randconfig-r014-20220128 (https://download.01.org/0day-ci/archive/20220128/202201281910.MDslPMAO-lkp(a)intel.com/config) compiler: arceb-elf-gcc (GCC) 11.2.0 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/a7a6fa70216ab5593374c0892808f5d198790c51 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Yong-Wu/component-Add-common-helpers-for-compare-release-functions/20220128-161211 git checkout a7a6fa70216ab5593374c0892808f5d198790c51 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/gpu/drm/sprd/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> drivers/gpu/drm/sprd/sprd_drm.c:137:12: error: redefinition of 'compare_of' 137 | static int compare_of(struct device *dev, void *data) | ^~~~~~~~~~ In file included from drivers/gpu/drm/sprd/sprd_drm.c:6: include/linux/component.h:88:19: note: previous definition of 'compare_of' with type 'int(struct device *, void *)' 88 | static inline int compare_of(struct device *dev, void *data) | ^~~~~~~~~~ vim +/compare_of +137 drivers/gpu/drm/sprd/sprd_drm.c 43531edd53f07c Kevin Tang 2021-12-07 136 43531edd53f07c Kevin Tang 2021-12-07 @137 static int compare_of(struct device *dev, void *data) 43531edd53f07c Kevin Tang 2021-12-07 138 { 43531edd53f07c Kevin Tang 2021-12-07 139 return dev->of_node == data; 43531edd53f07c Kevin Tang 2021-12-07 140 } 43531edd53f07c Kevin Tang 2021-12-07 141 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org