Hi Marek, kernel test robot noticed the following build errors: [auto build test ERROR on linus/master] [also build test ERROR on v6.12-rc6] [cannot apply to lee-leds/for-leds-next robh/for-next next-20241104] [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/20241104-223435 base: linus/master patch link: https://lore.kernel.org/r/20241104141924.18816-8-kabel%40kernel.org patch subject: [PATCH leds v5 07/12] leds: turris-omnia: Notify sysfs on MCU global LEDs brightness change config: arm-randconfig-003-20241105 (https://download.01.org/0day-ci/archive/20241105/202411051138.jzDE6sBH-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241105/202411051138.jzDE6sBH-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/202411051138.jzDE6sBH-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: drivers/leds/leds-turris-omnia.o: in function `omnia_cmd_set_color': >> include/linux/turris-omnia-mcu-interface.h:275:(.text+0x5a): undefined reference to `omnia_cmd_write_read' arm-linux-gnueabi-ld: drivers/leds/leds-turris-omnia.o: in function `omnia_cmd_read_u16': include/linux/turris-omnia-mcu-interface.h:311:(.text+0xaa): undefined reference to `omnia_cmd_write_read' arm-linux-gnueabi-ld: drivers/leds/leds-turris-omnia.o: in function `gamma_correction_show': include/linux/turris-omnia-mcu-interface.h:311:(.text+0x1a2): undefined reference to `omnia_cmd_write_read' arm-linux-gnueabi-ld: drivers/leds/leds-turris-omnia.o: in function `omnia_cmd_write_u8': include/linux/turris-omnia-mcu-interface.h:275:(.text+0x1c8): undefined reference to `omnia_cmd_write_read' arm-linux-gnueabi-ld: drivers/leds/leds-turris-omnia.o: in function `brightness_show': include/linux/turris-omnia-mcu-interface.h:311:(.text+0x4c2): undefined reference to `omnia_cmd_write_read' vim +275 include/linux/turris-omnia-mcu-interface.h 9f74fe5691025f Marek Behún 2024-11-04 267 9f74fe5691025f Marek Behún 2024-11-04 268 int omnia_cmd_write_read(const struct i2c_client *client, 9f74fe5691025f Marek Behún 2024-11-04 269 void *cmd, unsigned int cmd_len, 9f74fe5691025f Marek Behún 2024-11-04 270 void *reply, unsigned int reply_len); 9f74fe5691025f Marek Behún 2024-11-04 271 9f74fe5691025f Marek Behún 2024-11-04 272 static inline int omnia_cmd_write(const struct i2c_client *client, void *cmd, 9f74fe5691025f Marek Behún 2024-11-04 273 unsigned int len) 9f74fe5691025f Marek Behún 2024-11-04 274 { 9f74fe5691025f Marek Behún 2024-11-04 @275 return omnia_cmd_write_read(client, cmd, len, NULL, 0); 9f74fe5691025f Marek Behún 2024-11-04 276 } 9f74fe5691025f Marek Behún 2024-11-04 277 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki