Hi Stanley, kernel test robot noticed the following build errors: [auto build test ERROR on usb/usb-testing] [also build test ERROR on usb/usb-next usb/usb-linus linus/master v6.5-rc3 next-20230728] [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/Stanley-Chang/doc-dt-bindings-usb-realtek-dwc3-Add-Realtek-DHC-RTD-SoC-DWC3-USB/20230728-115507 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing patch link: https://lore.kernel.org/r/20230728035318.18741-1-stanley_chang%40realtek.com patch subject: [PATCH v1 1/2] usb: dwc3: add Realtek DHC RTD SoC dwc3 glue layer driver config: x86_64-randconfig-r072-20230728 (https://download.01.org/0day-ci/archive/20230729/202307291202.NBP2coNC-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce: (https://download.01.org/0day-ci/archive/20230729/202307291202.NBP2coNC-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/202307291202.NBP2coNC-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): ld: vmlinux.o: in function `dwc3_rtk_remove_role_switch': >> drivers/usb/dwc3/dwc3-rtk.c:196: undefined reference to `usb_role_switch_unregister' vim +196 drivers/usb/dwc3/dwc3-rtk.c 192 193 static int dwc3_rtk_remove_role_switch(struct dwc3_rtk *rtk) 194 { 195 if (rtk->role_switch) > 196 usb_role_switch_unregister(rtk->role_switch); 197 198 rtk->role_switch = NULL; 199 200 return 0; 201 } 202 #else 203 #define dwc3_rtk_setup_role_switch(x) 0 204 #define dwc3_rtk_remove_role_switch(x) 0 205 #endif 206 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki