Hi Xu, Thank you for the patch! Yet something to improve: [auto build test ERROR on next-20200915] [also build test ERROR on v5.9-rc5] [cannot apply to linux/master linus/master v5.9-rc5 v5.9-rc4 v5.9-rc3] [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/Xu-Yilun/memory-dfl-emif-add-the... base: 6b02addb1d1748d21dd1261e46029b264be4e5a0 config: arc-allyesconfig (attached as .config) compiler: arceb-elf-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): 10 | #include <linux/fpga/dfl.h> | ^~~~~~~~~~~~~~~~~~ compilation terminated. # https://github.com/0day-ci/linux/commit/3d9bcf23589d9e5a2409f2d939d3303ee... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Xu-Yilun/memory-dfl-emif-add-the-DFL-EMIF-private-feature-driver/20200916-134300 git checkout 3d9bcf23589d9e5a2409f2d939d3303eea7852c3 vim +10 drivers/memory/dfl-emif.c 11 #include <linux/io.h> 12 #include <linux/iopoll.h> 13 #include <linux/io-64-nonatomic-lo-hi.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/spinlock.h> 17 #include <linux/types.h> 18 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org