Hi Lizhi, I love your patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on linus/master v5.11 next-20210218] [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/Lizhi-Hou/XRT-Alveo-driver-overv... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2ab38c17aac10bf55ab3efde4c4db3893d8691d2 config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-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/9069f42b5fcafe471ceb1047ee5398309... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Lizhi-Hou/XRT-Alveo-driver-overview/20210218-151631 git checkout 9069f42b5fcafe471ceb1047ee53983098b2edba # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 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 >>): arm-linux-gnueabi-ld: drivers/fpga/xrt/lib/xleaf/clock.o: in function `get_freq': --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org