Hi Cai, I love your patch! Yet something to improve: [auto build test ERROR on drm/drm-next] [also build test ERROR on linus/master v5.19-rc2 next-20220617] [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/intel-lab-lkp/linux/commits/Cai-Huoqing/drm-Make-drm_buddy-a-part-of-drm-module/20220621-095417 base: git://anongit.freedesktop.org/drm/drm drm-next config: microblaze-buildonly-randconfig-r003-20220620 (https://download.01.org/0day-ci/archive/20220621/202206211156.FjsteJJC-lkp@xxxxxxxxx/config) compiler: microblaze-linux-gcc (GCC) 11.3.0 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/intel-lab-lkp/linux/commit/517d5f44c861a5173eaa9a06efebe2ce2a6601a1 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Cai-Huoqing/drm-Make-drm_buddy-a-part-of-drm-module/20220621-095417 git checkout 517d5f44c861a5173eaa9a06efebe2ce2a6601a1 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=microblaze SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): microblaze-linux-ld: drivers/gpu/drm/drm_buddy.o: in function `drm_buddy_block_print': drivers/gpu/drm/drm_buddy.c:731: undefined reference to `drm_printf' microblaze-linux-ld: drivers/gpu/drm/drm_buddy.o: in function `drm_buddy_print': drivers/gpu/drm/drm_buddy.c:745: undefined reference to `drm_printf' >> microblaze-linux-ld: drivers/gpu/drm/drm_buddy.c:757: undefined reference to `drm_printf' microblaze-linux-ld: drivers/gpu/drm/drm_buddy.c:763: undefined reference to `drm_printf' microblaze-linux-ld: drivers/gpu/drm/drm_buddy.c:765: undefined reference to `drm_printf' microblaze-linux-ld: drivers/gpu/drm/drm_buddy.o:drivers/gpu/drm/drm_buddy.c:761: more undefined references to `drm_printf' follow -- 0-DAY CI Kernel Test Service https://01.org/lkp
