Hi "Christian, I love your patch! Yet something to improve: [auto build test ERROR on drm-tip/drm-tip] [also build test ERROR on next-20200720] [cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master drm/drm-next v5.8-rc6] [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/Christian-K-nig/drm-remove-optio... base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: ia64-allmodconfig (attached as .config) compiler: ia64-linux-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=ia64 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 >>): drivers/gpu/drm/drm_gem_vram_helper.c: In function 'bo_driver_init_mem_type': 1012 | man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; | ^~~~~~~~~~~~~~~~~~~~~~~~~ | TTM_MEMTYPE_FLAG_FIXED drivers/gpu/drm/drm_gem_vram_helper.c:1012:16: note: each undeclared identifier is reported only once for each function it appears in drivers/gpu/drm/drm_gem_vram_helper.c: In function 'bo_driver_io_mem_reserve': drivers/gpu/drm/drm_gem_vram_helper.c:1065:21: error: 'TTM_MEMTYPE_FLAG_MAPPABLE' undeclared (first use in this function); did you mean 'TTM_MEMTYPE_FLAG_FIXED'? 1065 | if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) | ^~~~~~~~~~~~~~~~~~~~~~~~~ | TTM_MEMTYPE_FLAG_FIXED vim +1012 drivers/gpu/drm/drm_gem_vram_helper.c 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1006 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1007 static int bo_driver_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1008 struct ttm_mem_type_manager *man) 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1009 { 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1010 switch (type) { 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1011 case TTM_PL_SYSTEM: 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 @1012 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1013 man->available_caching = TTM_PL_MASK_CACHING; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1014 man->default_caching = TTM_PL_FLAG_CACHED; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1015 break; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1016 case TTM_PL_VRAM: 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1017 man->func = &ttm_bo_manager_func; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1018 man->flags = TTM_MEMTYPE_FLAG_FIXED | 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1019 TTM_MEMTYPE_FLAG_MAPPABLE; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1020 man->available_caching = TTM_PL_FLAG_UNCACHED | 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1021 TTM_PL_FLAG_WC; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1022 man->default_caching = TTM_PL_FLAG_WC; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1023 break; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1024 default: 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1025 return -EINVAL; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1026 } 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1027 return 0; 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1028 } 6b5ce4a1fb8489 Thomas Zimmermann 2019-09-11 1029 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org