Hi "Noralf, 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 linus/master drm-exynos/exynos-drm-next v5.12-rc3] [cannot apply to drm-tip/drm-tip drm/drm-next next-20210319] [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/Noralf-Tr-nnes/GUD-USB-Display-d... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/744847276b3d24137418fc2f15fc99ad8... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Noralf-Tr-nnes/GUD-USB-Display-driver/20210313-192802 git checkout 744847276b3d24137418fc2f15fc99ad8bd229c6 # save the attached .config to linux build tree make W=1 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 errors (new ones prefixed by >>): 22 | #include <drm/drm_gem_atomic_helper.h> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. vim +22 drivers/gpu/drm/gud/gud_drv.c 15 16 #include <drm/drm_atomic_helper.h> 17 #include <drm/drm_damage_helper.h> 18 #include <drm/drm_debugfs.h> 19 #include <drm/drm_drv.h> 20 #include <drm/drm_fb_helper.h> 21 #include <drm/drm_fourcc.h> 23 #include <drm/drm_gem_framebuffer_helper.h> 24 #include <drm/drm_gem_shmem_helper.h> 25 #include <drm/drm_managed.h> 26 #include <drm/drm_print.h> 27 #include <drm/drm_probe_helper.h> 28 #include <drm/drm_simple_kms_helper.h> 29 #include <drm/gud.h> 30 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org