Function prototype or declaration at include/linux/usb/composite.h, line 600 References: drivers/usb/gadget/configfs.c, line 594 drivers/usb/gadget/configfs.c, line 600 drivers/usb/gadget/function/f_acm.c, line 783 drivers/usb/gadget/function/f_fs.c, line 3483 drivers/usb/gadget/function/f_hid.c, line 867 drivers/usb/gadget/function/f_loopback.c, line 466 drivers/usb/gadget/function/f_mass_storage.c, line 3229 drivers/usb/gadget/function/f_midi.c, line 1078 drivers/usb/gadget/function/f_phonet.c, line 582 drivers/usb/gadget/function/f_printer.c, line 1155 drivers/usb/gadget/function/f_serial.c, line 262 drivers/usb/gadget/function/f_sourcesink.c, line 881 drivers/usb/gadget/function/f_tcm.c, line 2162 drivers/usb/gadget/function/f_uac1.c, line 641 drivers/usb/gadget/function/f_uac2.c, line 983 drivers/usb/gadget/function/uvc_configfs.c, line 2375 drivers/usb/gadget/legacy/audio.c, line 325 drivers/usb/gadget/legacy/audio.c, line 327 drivers/usb/gadget/legacy/audio.c, line 338 drivers/usb/gadget/legacy/audio.c, line 343 drivers/usb/gadget/legacy/hid.c, line 198 drivers/usb/gadget/legacy/hid.c, line 209 drivers/usb/gadget/legacy/printer.c, line 198 drivers/usb/gadget/legacy/printer.c, line 205 drivers/usb/gadget/legacy/zero.c, line 388 drivers/usb/gadget/legacy/zero.c, line 394 drivers/usb/gadget/legacy/zero.c, line 404 drivers/usb/gadget/legacy/zero.c, line 407 include/linux/usb/composite.h, line 600