Hi Heiner, kernel test robot noticed the following build errors: [auto build test ERROR on wsa/i2c/for-next] [also build test ERROR on next-20240112] [cannot apply to linus/master v6.7] [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/Heiner-Kallweit/i2c-smbus-Prepare-i2c_register_spd-for-usage-on-muxed-segments/20240111-042152 base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next patch link: https://lore.kernel.org/r/53e5c71a-d954-4211-91a1-de067451d532%40gmail.com patch subject: [PATCH 2/4] i2c: mux: add basic support for calling i2c_register_spd on muxed bus segments config: loongarch-randconfig-001-20240111 (https://download.01.org/0day-ci/archive/20240113/202401131601.Qe16pupf-lkp@xxxxxxxxx/config) compiler: loongarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240113/202401131601.Qe16pupf-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/202401131601.Qe16pupf-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): loongarch64-linux-ld: drivers/i2c/i2c-mux.o: in function `.L155': >> i2c-mux.c:(.text+0xc84): undefined reference to `i2c_register_spd' -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki