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: arm-defconfig (attached as .config) compiler: arm-linux-gnueabi-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=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/rcar-du/rcar_du_drv.h:21, from drivers/gpu/drm/rcar-du/rcar_du_crtc.c:27: 78 | static inlinc void rcar_du_vsp_modeset(struct rcar_du_crtc *crtc) { }; | ^~~~~ | ; 78 | static inlinc void rcar_du_vsp_modeset(struct rcar_du_crtc *crtc) { }; | ^~~~~~~~~~~~~~~~~~~ vim +78 drivers/gpu/drm/rcar-du/rcar_du_vsp.h 77 79 static inline void rcar_du_vsp_enable(struct rcar_du_crtc *crtc) { }; 80 static inline void rcar_du_vsp_disable(struct rcar_du_crtc *crtc) { }; 81 static inline void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc) { }; 82 static inline void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc) { }; 83 static inline int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, 84 struct drm_framebuffer *fb, 85 struct sg_table sg_tables[3]) 86 { 87 return -ENXIO; 88 } 89 static inline void rcar_du_vsp_unmap_fb(struct rcar_du_vsp *vsp, 90 struct drm_framebuffer *fb, 91 struct sg_table sg_tables[3]) 92 { 93 } 94 #endif 95 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org