Hi Andy, I love your patch! Yet something to improve: [auto build test ERROR on clk/clk-next] [also build test ERROR on rockchip/for-next linux/master linus/master v5.14-rc1 next-20210715] [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/Andy-Shevchenko/clk-fractional-d... base: https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next config: arm64-buildonly-randconfig-r001-20210715 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 0e49c54a8cbd3e779e5526a5888c683c01cc3c50) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/bcba401c1ad5c03f7d638f99c799576a7... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Andy-Shevchenko/clk-fractional-divider-Export-approximation-algo-to-the-CCF-users/20210715-200828 git checkout bcba401c1ad5c03f7d638f99c799576a771e87ca # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm64 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 >>): #include "clk-fractional-divider.h" ^~~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. vim +27 drivers/clk/rockchip/clk.c 25 26 #include "clk.h" 28 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org