tree: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git topic/midi20-gadget head: ed28b6939ebadd073e731ccf0f2c6ce4ab102ffd commit: ed28b6939ebadd073e731ccf0f2c6ce4ab102ffd [56/56] usb: gadget: add support for USB MIDI 2.0 function driver (WIP) config: arm-randconfig-r046-20230629 (https://download.01.org/0day-ci/archive/20230630/202306300438.HICMJktb-lkp@i...) compiler: arm-linux-gnueabi-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230630/202306300438.HICMJktb-lkp@i...)

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@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202306300438.HICMJktb-lkp@intel.com/

All error/warnings (new ones prefixed by >>, old ones prefixed by <<):

...

drivers/usb/gadget/function/f_midi2.c:483:6: warning: no previous prototype for 'reply_ump_stream_fb_info' [-Wmissing-prototypes]

483 | void reply_ump_stream_fb_info(struct f_midi2 *midi2, int blk) | ^~~~~~~~~~~~~~~~~~~~~~~~ --

...

ERROR: modpost: "snd_ump_block_new" [drivers/usb/gadget/function/usb_f_midi2.ko] undefined! ERROR: modpost: "snd_ump_receive_ump_val" [drivers/usb/gadget/function/usb_f_midi2.ko] undefined! ERROR: modpost: "snd_ump_transmit" [drivers/usb/gadget/function/usb_f_midi2.ko] undefined! ERROR: modpost: "snd_ump_receive" [drivers/usb/gadget/function/usb_f_midi2.ko] undefined! ERROR: modpost: "snd_ump_endpoint_new" [drivers/usb/gadget/function/usb_f_midi2.ko] undefined!