Hi Marek, kernel test robot noticed the following build errors: [auto build test ERROR on next-20240913] [also build test ERROR on v6.11-rc7] [cannot apply to lee-leds/for-leds-next robh/for-next linus/master v6.11-rc7 v6.11-rc6 v6.11-rc5] [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/Marek-Beh-n/turris-omnia-mcu-interface-h-Move-command-execution-function-to-global-header/20240913-203320 base: next-20240913 patch link: https://lore.kernel.org/r/20240913123103.21226-3-kabel%40kernel.org patch subject: [PATCH leds v3 02/11] leds: turris-omnia: Use command execution functions from the MCU driver config: arc-randconfig-001-20240914 (https://download.01.org/0day-ci/archive/20240914/202409141326.XsUVZj3l-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240914/202409141326.XsUVZj3l-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/202409141326.XsUVZj3l-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): arc-elf-ld: drivers/leds/leds-turris-omnia.o: in function `gamma_correction_show': >> leds-turris-omnia.c:(.text+0x26): undefined reference to `omnia_cmd_write_read' >> arc-elf-ld: leds-turris-omnia.c:(.text+0x26): undefined reference to `omnia_cmd_write_read' arc-elf-ld: drivers/leds/leds-turris-omnia.o: in function `brightness_show': leds-turris-omnia.c:(.text+0x98): undefined reference to `omnia_cmd_write_read' arc-elf-ld: leds-turris-omnia.c:(.text+0x98): undefined reference to `omnia_cmd_write_read' arc-elf-ld: drivers/leds/leds-turris-omnia.o: in function `omnia_led_send_color_cmd': leds-turris-omnia.c:(.text+0xfc): undefined reference to `omnia_cmd_write_read' arc-elf-ld: drivers/leds/leds-turris-omnia.o:leds-turris-omnia.c:(.text+0xfc): more undefined references to `omnia_cmd_write_read' follow -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki