Hi Grace, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on drm-tip/drm-tip drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master v5.14-rc1 next-20210714] [cannot apply to 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/Grace-An/drm-return-int-error-co... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: xtensa-randconfig-s031-20210713 (attached as .config) compiler: xtensa-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/2f5324deb5c8ffa632b47e073c8f7c270... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Grace-An/drm-return-int-error-code-from-mode_fixup/20210714-154532 git checkout 2f5324deb5c8ffa632b47e073c8f7c27046d79a9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=xtensa 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 >>): 112 | .mode_fixup = exynos_crtc_mode_fixup, | ^~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/exynos/exynos_drm_crtc.c:112:16: note: (near initialization for 'exynos_crtc_helper_funcs.mode_fixup') cc1: some warnings being treated as errors -- 1324 | .mode_fixup = vc4_dsi_encoder_mode_fixup, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/vc4/vc4_dsi.c:1324:16: note: (near initialization for 'vc4_dsi_encoder_helper_funcs.mode_fixup') cc1: some warnings being treated as errors -- 501 | .mode_fixup = vc4_vec_encoder_mode_fixup, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/vc4/vc4_vec.c:501:16: note: (near initialization for 'vc4_vec_encoder_helper_funcs.mode_fixup') cc1: some warnings being treated as errors vim +112 drivers/gpu/drm/exynos/exynos_drm_crtc.c 2466db97e39d54 Andrzej Hajda 2017-09-29 108 2466db97e39d54 Andrzej Hajda 2017-09-29 109 a392276d1dec63 Andrzej Hajda 2017-03-14 110 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { c3653fede57f30 Andrzej Hajda 2017-08-24 111 .mode_valid = exynos_crtc_mode_valid, 2466db97e39d54 Andrzej Hajda 2017-09-29 @112 .mode_fixup = exynos_crtc_mode_fixup, a392276d1dec63 Andrzej Hajda 2017-03-14 113 .atomic_check = exynos_crtc_atomic_check, a392276d1dec63 Andrzej Hajda 2017-03-14 114 .atomic_begin = exynos_crtc_atomic_begin, a392276d1dec63 Andrzej Hajda 2017-03-14 115 .atomic_flush = exynos_crtc_atomic_flush, 0b20a0f8c3cb6f Laurent Pinchart 2017-06-30 116 .atomic_enable = exynos_drm_crtc_atomic_enable, 64581714b58bc3 Laurent Pinchart 2017-06-30 117 .atomic_disable = exynos_drm_crtc_atomic_disable, a392276d1dec63 Andrzej Hajda 2017-03-14 118 }; a392276d1dec63 Andrzej Hajda 2017-03-14 119 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org