tree: https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next head: fb0833325ac45560e6b62681c77bed56bcfc20a9 commit: c3747f28ebcefe34d6ea2e4eb2d3bb6b9d574b5f [13/34] hwmon: add fan speed monitoring driver for Surface devices config: x86_64-randconfig-121-20240205 (https://download.01.org/0day-ci/archive/20240205/202402051456.JOjQbD3G-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/20240205/202402051456.JOjQbD3G-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/202402051456.JOjQbD3G-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): ld: drivers/hwmon/surface_fan.o: in function `surface_fan_init': >> drivers/hwmon/surface_fan.c:87: undefined reference to `__ssam_device_driver_register' ld: drivers/hwmon/surface_fan.o: in function `surface_fan_exit': >> drivers/hwmon/surface_fan.c:87: undefined reference to `ssam_device_driver_unregister' vim +87 drivers/hwmon/surface_fan.c 78 79 static struct ssam_device_driver surface_fan = { 80 .probe = surface_fan_probe, 81 .match_table = ssam_fan_match, 82 .driver = { 83 .name = "surface_fan", 84 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 85 }, 86 }; > 87 module_ssam_device_driver(surface_fan); 88 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki