Hi John, kernel test robot noticed the following build errors: [auto build test ERROR on rust/rust-next] [also build test ERROR on linus/master v6.12 next-20241122] [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/John-Ogness/printk-ringbuffer-Add-KUnit-test/20241121-225731 base: https://github.com/Rust-for-Linux/linux rust-next patch link: https://lore.kernel.org/r/20241121145034.123367-1-john.ogness%40linutronix.de patch subject: [PATCH printk v1] printk: ringbuffer: Add KUnit test config: i386-randconfig-141-20241122 (https://download.01.org/0day-ci/archive/20241123/202411230506.L5KQdiGm-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241123/202411230506.L5KQdiGm-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202411230506.L5KQdiGm-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "__udivdi3" [kernel/printk/printk_ringbuffer_test.ko] undefined! -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki