Hi Damien, I love your patch! Yet something to improve: [auto build test ERROR on robh/for-next] [also build test ERROR on pza/reset/next clk/clk-next pinctrl/devel linus/master v5.10-rc7 next-20201211] [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/Damien-Le-Moal/RISC-V-Kendryte-K... base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: riscv-nommu_k210_defconfig (attached as .config) compiler: riscv64-linux-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/c991c894ad9babfd2aa8c6ce90bc4ce67... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Damien-Le-Moal/RISC-V-Kendryte-K210-support-improvements/20201213-161554 git checkout c991c894ad9babfd2aa8c6ce90bc4ce67559937c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the linux-review/Damien-Le-Moal/RISC-V-Kendryte-K210-support-improvements/20201213-161554 HEAD 1d5c5d861e901913b314c9f41209f826217e3674 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): FATAL ERROR: Unable to parse input tree --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org