Hi Li-hao, I love your patch! Yet something to improve: [auto build test ERROR on broonie-spi/for-next] [also build test ERROR on pza/reset/next robh/for-next linus/master v5.16] [cannot apply to next-20220110] [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/Li-hao-Kuo/Add-SPI-control-drive... base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20220110/202201101911.hSqY5DkA-lk...) compiler: alpha-linux-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/53da1eda2d6e7a04e09dcb37a029ec3b3... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Li-hao-Kuo/Add-SPI-control-driver-for-Sunplus-SP7021-SoC/20220110-144745 git checkout 53da1eda2d6e7a04e09dcb37a029ec3b384b7afb # 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=alpha SHELL=/bin/bash 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 >>): make[3]: Target '__build' not remade because of errors. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org