tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 33e1d31873f87d119e5120b88cd350efa68ef276 commit: 66c76c1cd984c14660453dfa2118014817924375 [2856/9575] backlight: Add Kinetic KTD2801 backlight support config: microblaze-randconfig-r133-20240225 (https://download.01.org/0day-ci/archive/20240226/202402261051.led61Qav-lkp@xxxxxxxxx/config) compiler: microblaze-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20240226/202402261051.led61Qav-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/202402261051.led61Qav-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): microblaze-linux-ld: drivers/video/backlight/ktd2801-backlight.o: in function `ktd2801_update_status': >> (.text+0x40): undefined reference to `expresswire_power_off' >> microblaze-linux-ld: (.text+0x54): undefined reference to `expresswire_enable' >> microblaze-linux-ld: (.text+0x6c): undefined reference to `expresswire_write_u8' Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for LEDS_EXPRESSWIRE Depends on [n]: NEW_LEDS [=n] && GPIOLIB [=y] Selected by [y]: - BACKLIGHT_KTD2801 [=y] && HAS_IOMEM [=y] && BACKLIGHT_CLASS_DEVICE [=y] -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki