On 2022/10/6 8:24, kernel test robot wrote:

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 [off-list ref]

All errors (new ones prefixed by >>):

   ld: kernel/kallsyms_selftest.o: in function `test_perf_kallsyms_lookup_name':

quoted

quoted

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'

OK, thanks, I should use do_div() to calculate percentage.


-- 
Regards,
  Zhen Lei