Hi Thomas, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on next-20200813] [cannot apply to drm-intel/for-linux-next linux-arm/drm-armada-devel linux-arm/drm-armada-fixes v5.8] [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/Thomas-Zimmermann/Convert-all-re... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dc06fe51d26efc100ac74121607c01a454867c91 config: arc-allmodconfig (attached as .config) compiler: arc-elf-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): 303 | .vm_ops = &drm_gem_cma_vm_ops, | ^~~~~~~~~~~~~~~~~~ | drm_gem_mmap_obj vim +303 drivers/gpu/drm/rockchip/rockchip_drm_gem.c 297 298 static const struct drm_gem_object_funcs rockchip_gem_object_funcs = { 299 .free = rockchip_gem_free_object, 300 .get_sg_table = rockchip_gem_prime_get_sg_table, 301 .vmap = rockchip_gem_prime_vmap, 302 .vunmap = rockchip_gem_prime_vunmap, 304 }; 305 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org