Hi Ming, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linuxtv-media/master] [also build test WARNING on robh/for-next v5.14-rc5] [cannot apply to shawnguo/for-next next-20210811] [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/Ming-Qian/imx8q-video-decoder-en... base: git://linuxtv.org/media_tree.git master config: x86_64-randconfig-a004-20210811 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d39ebdae674c8efc84ebe8dc32716ec353220530) 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/2fa6f8ecd73870259a9a985a8b214d5eb... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ming-Qian/imx8q-video-decoder-encoder-driver/20210811-164741 git checkout 2fa6f8ecd73870259a9a985a8b214d5eb58a5314 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): In file included from <built-in>:1: In file included from ./usr/include/linux/imx_vpu.h:9: ./usr/include/linux/videodev2.h:2403:20: error: field has incomplete type 'struct timespec' struct timespec timestamp; ^ ./usr/include/linux/videodev2.h:2403:9: note: forward declaration of 'struct timespec' struct timespec timestamp; ^ In file included from <built-in>:1: //error happened in dec/enc ^ 1 warning and 1 error generated. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org