Hi Melissa, I love your patch! Perhaps something to improve: [auto build test WARNING on next-20210412] [also build test WARNING on v5.12-rc7] [cannot apply to linus/master v5.12-rc7 v5.12-rc6 v5.12-rc5] [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/Melissa-Wen/drm-vkms-add-overlay... base: 5df924d19629975d565da37eb7268c7bf4d491fe config: csky-randconfig-r025-20210413 (attached as .config) compiler: csky-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/0a7d24840b9dbaabf6247f940b4387a12... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Melissa-Wen/drm-vkms-add-overlay-plane-support/20210413-065337 git checkout 0a7d24840b9dbaabf6247f940b4387a120efe9a9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=csky If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/gpu/drm/vkms/vkms_plane.c: In function 'vkms_plane_init': 197 | const struct drm_plane_helper_funcs *funcs; | ^~~~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for LOCKDEP Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86) Selected by - PROVE_LOCKING && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT - LOCK_STAT && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT vim +/funcs +197 drivers/gpu/drm/vkms/vkms_plane.c 42ac03213b7f10 Rodrigo Siqueira 2018-07-12 192 0a7d24840b9dba Melissa Wen 2021-04-12 193 struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, e9d85f731de06a Rodrigo Siqueira 2019-06-25 194 enum drm_plane_type type, int index) 854502fa0a38dc Rodrigo Siqueira 2018-05-16 195 { 854502fa0a38dc Rodrigo Siqueira 2018-05-16 196 struct drm_device *dev = &vkmsdev->drm; c27d931d402b51 Haneen Mohammed 2018-09-06 @197 const struct drm_plane_helper_funcs *funcs; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org