Hi Andre, I love your patch! Yet something to improve: [auto build test ERROR on sunxi/sunxi/for-next] [also build test ERROR on v5.13-rc6] [cannot apply to lee-mfd/for-mfd-next mripard/sunxi/for-next next-20210617] [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/Andre-Przywara/arm64-sunxi-Initi... base: https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux.git sunxi/for-next config: powerpc64-randconfig-c004-20210617 (attached as .config) compiler: powerpc-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/37e20f7c0cd874098fdb0f978c87d7076... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Andre-Przywara/arm64-sunxi-Initial-Allwinner-H616-SoC-support/20210617-022925 git checkout 37e20f7c0cd874098fdb0f978c87d70765012609 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 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 >>): powerpc-linux-ld: drivers/rtc/rtc-sun6i.o: in function `sun6i_rtc_setalarm': powerpc-linux-ld: drivers/rtc/rtc-sun6i.o: in function `sun6i_rtc_settime': rtc-sun6i.c:(.text.sun6i_rtc_settime+0x218): undefined reference to `__udivdi3' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org