Hi Zhen, Thank you for the patch! Yet something to improve: [auto build test ERROR on mcgrof/modules-next] [also build test ERROR on rostedt-trace/for-next v6.0] [cannot apply to linus/master next-20221005] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Zhen-Lei/kallsyms-Optimizes-the-performance-of-lookup-symbols/20220924-202522 base: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git modules-next config: i386-allyesconfig compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/43e45bdbf95415fc26a9d55e7db43a75bdb8e99a git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Zhen-Lei/kallsyms-Optimizes-the-performance-of-lookup-symbols/20220924-202522 git checkout 43e45bdbf95415fc26a9d55e7db43a75bdb8e99a # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): ld: kernel/kallsyms_selftest.o: in function `test_perf_kallsyms_lookup_name': >> kallsyms_selftest.c:(.text.unlikely+0x5e3): undefined reference to `__udivdi3' ld: kernel/kallsyms_selftest.o: in function `test_kallsyms_compression_ratio': kallsyms_selftest.c:(.text.unlikely+0x771): undefined reference to `__udivdi3' -- 0-DAY CI Kernel Test Service https://01.org/lkp