Hi Thomas, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.12-rc6 next-20210406] [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/drm-Generic-dumb_map_offset-for-TTM-based-drivers/20210406-163159 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 0a50438c84363bd37fe18fe432888ae9a074dcab config: arm64-allyesconfig (attached as .config) compiler: aarch64-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 # https://github.com/0day-ci/linux/commit/80a1349080db0bb20f1e9a9909470c09d125daab git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Thomas-Zimmermann/drm-Generic-dumb_map_offset-for-TTM-based-drivers/20210406-163159 git checkout 80a1349080db0bb20f1e9a9909470c09d125daab # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c:63:28: error: 'drm_gem_vram_driver_dumb_mmap_offset' undeclared here (not in a function); did you mean 'drm_gem_vram_driver_dumb_create'? 63 | .dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | drm_gem_vram_driver_dumb_create vim +63 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c 552a77bab3ff86 Tian Tao 2020-12-04 52 70a59dd82959f8 Daniel Vetter 2020-11-04 53 static const struct drm_driver hibmc_driver = { 5b38e7475e3dc5 Daniel Vetter 2019-01-29 54 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 5e0df3a08f3d17 Rongrong Zou 2016-11-16 55 .fops = &hibmc_fops, 5e0df3a08f3d17 Rongrong Zou 2016-11-16 56 .name = "hibmc", 5e0df3a08f3d17 Rongrong Zou 2016-11-16 57 .date = "20160828", 5e0df3a08f3d17 Rongrong Zou 2016-11-16 58 .desc = "hibmc drm driver", 5e0df3a08f3d17 Rongrong Zou 2016-11-16 59 .major = 1, 5e0df3a08f3d17 Rongrong Zou 2016-11-16 60 .minor = 0, de2318f69366cd Thomas Zimmermann 2019-12-03 61 .debugfs_init = drm_vram_mm_debugfs_init, e4daebc77e7b34 Rongrong Zou 2016-11-16 62 .dumb_create = hibmc_dumb_create, e2f572aa9cbb30 Thomas Zimmermann 2019-05-08 @63 .dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset, 80be7eed1d32fb Thomas Zimmermann 2019-07-02 64 .gem_prime_mmap = drm_gem_prime_mmap, 1d98b91611725e Rongrong Zou 2016-11-16 65 .irq_handler = hibmc_drm_interrupt, 5e0df3a08f3d17 Rongrong Zou 2016-11-16 66 }; 5e0df3a08f3d17 Rongrong Zou 2016-11-16 67 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org