Hi Xiang, Thank you for the patch! Yet something to improve: [auto build test ERROR on drm/drm-next] [also build test ERROR on v5.16-rc5 next-20211214] [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/Xiang-wangx/drm-tilcdc-add-const... base: git://anongit.freedesktop.org/drm/drm drm-next config: arm-randconfig-c002-20211214 (https://download.01.org/0day-ci/archive/20211216/202112160411.sNrSELAY-lk...) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 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/5698eadb76d94a4fc5298f5bea88b8393... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Xiang-wangx/drm-tilcdc-add-const-to-of_device_id/20211216-002326 git checkout 5698eadb76d94a4fc5298f5bea88b839399ddef0 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/gpu/drm/tilcdc/ 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 >>): 590 | static const struct of_device_id tilcdc_of_match[] = { | ^~~~~~~~~~~~~~~ drivers/gpu/drm/tilcdc/tilcdc_drv.c:63:28: note: previous declaration of 'tilcdc_of_match' with type 'struct of_device_id[]' 63 | static struct of_device_id tilcdc_of_match[]; | ^~~~~~~~~~~~~~~ drivers/gpu/drm/tilcdc/tilcdc_drv.c:63:28: error: array 'tilcdc_of_match' assumed to have one element [-Werror] cc1: all warnings being treated as errors vim +590 drivers/gpu/drm/tilcdc/tilcdc_drv.c 589 591 { .compatible = "ti,am33xx-tilcdc", }, 592 { .compatible = "ti,da850-tilcdc", }, 593 { }, 594 }; 595 MODULE_DEVICE_TABLE(of, tilcdc_of_match); 596 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org