Structure at include/linux/usb/composite.h, line 268 References: drivers/usb/gadget/audio.c, line 164 drivers/usb/gadget/cdc2.c, line 243 drivers/usb/gadget/composite.c, line 42 drivers/usb/gadget/composite.c, line 1261 drivers/usb/gadget/composite.c, line 1286 drivers/usb/gadget/ether.c, line 400 drivers/usb/gadget/g_ffs.c, line 161 drivers/usb/gadget/hid.c, line 254 drivers/usb/gadget/mass_storage.c, line 168 drivers/usb/gadget/multi.c, line 350 drivers/usb/gadget/ncm.c, line 227 drivers/usb/gadget/nokia.c, line 240 drivers/usb/gadget/serial.c, line 241 drivers/usb/gadget/webcam.c, line 372 drivers/usb/gadget/zero.c, line 339 include/linux/usb/composite.h, line 268 include/linux/usb/composite.h, line 285 include/linux/usb/composite.h, line 287 include/linux/usb/composite.h, line 334