Hi Linyu, Thank you for the patch! Yet something to improve: [auto build test ERROR on usb/usb-testing] [also build test ERROR on v5.18-rc6 next-20220506] [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] url: https://github.com/intel-lab-lkp/linux/commits/Linyu-Yuan/usb-gadget-update-DECLARE_USB_FUNCTION-_INIT-macro/20220509-144542 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: nios2-randconfig-r035-20220509 (https://download.01.org/0day-ci/archive/20220509/202205091634.SZNjdkFo-lkp@xxxxxxxxx/config) compiler: nios2-linux-gcc (GCC) 11.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/5c9f589ea23bf995436cde6bd39f1c5b2cc1ec4f git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Linyu-Yuan/usb-gadget-update-DECLARE_USB_FUNCTION-_INIT-macro/20220509-144542 git checkout 5c9f589ea23bf995436cde6bd39f1c5b2cc1ec4f # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=nios2 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): nios2-linux-ld: drivers/usb/gadget/function/f_sourcesink.o: in function `sslb_modinit': >> f_sourcesink.c:(.init.text+0x0): multiple definition of `init_module'; drivers/usb/gadget/function/f_loopback.o:f_loopback.c:(.init.text+0x0): first defined here nios2-linux-ld: drivers/usb/gadget/function/f_sourcesink.o: in function `sslb_modexit': >> f_sourcesink.c:(.exit.text+0x0): multiple definition of `cleanup_module'; drivers/usb/gadget/function/f_loopback.o:f_loopback.c:(.exit.text+0x0): first defined here -- 0-DAY CI Kernel Test Service https://01.org/lkp