Function prototype or declaration at include/linux/usb/gadget.h, line 839 References: drivers/usb/chipidea/udc.c, line 928 drivers/usb/chipidea/udc.c, line 1536 drivers/usb/chipidea/udc.c, line 1548 drivers/usb/chipidea/udc.c, line 1856 drivers/usb/chipidea/udc.c, line 1873 drivers/usb/dwc2/gadget.c, line 3239 drivers/usb/dwc3/ep0.c, line 134 drivers/usb/dwc3/ep0.c, line 579 drivers/usb/dwc3/ep0.c, line 581 drivers/usb/dwc3/ep0.c, line 621 drivers/usb/dwc3/ep0.c, line 637 drivers/usb/dwc3/ep0.c, line 1098 drivers/usb/dwc3/gadget.c, line 2719 drivers/usb/gadget/composite.c, line 790 drivers/usb/gadget/legacy/inode.c, line 1439 drivers/usb/gadget/udc/bdc/bdc_ep.c, line 1127 drivers/usb/gadget/udc/bdc/bdc_ep.c, line 1129 drivers/usb/gadget/udc/bdc/bdc_ep.c, line 1450 drivers/usb/gadget/udc/bdc/bdc_ep.c, line 1459 drivers/usb/gadget/udc/bdc/bdc_udc.c, line 125 drivers/usb/gadget/udc/bdc/bdc_udc.c, line 256 drivers/usb/gadget/udc/bdc/bdc_udc.c, line 552 drivers/usb/gadget/udc/core.c, line 1001 drivers/usb/gadget/udc/core.c, line 1007 drivers/usb/gadget/udc/core.c, line 1052 drivers/usb/gadget/udc/core.c, line 1207 drivers/usb/gadget/udc/core.c, line 1426 drivers/usb/gadget/udc/gr_udc.c, line 784 drivers/usb/gadget/udc/gr_udc.c, line 897 drivers/usb/gadget/udc/gr_udc.c, line 899 drivers/usb/gadget/udc/gr_udc.c, line 1143 drivers/usb/gadget/udc/gr_udc.c, line 1147 drivers/usb/gadget/udc/gr_udc.c, line 1173 drivers/usb/gadget/udc/gr_udc.c, line 1218 drivers/usb/gadget/udc/gr_udc.c, line 1358 drivers/usb/gadget/udc/gr_udc.c, line 1378 drivers/usb/isp1760/isp1760-udc.c, line 508 drivers/usb/isp1760/isp1760-udc.c, line 626 drivers/usb/isp1760/isp1760-udc.c, line 1059 drivers/usb/isp1760/isp1760-udc.c, line 1073 drivers/usb/isp1760/isp1760-udc.c, line 1219 drivers/usb/mtu3/mtu3_gadget.c, line 717 drivers/usb/mtu3/mtu3_gadget_ep0.c, line 454 drivers/usb/mtu3/mtu3_gadget_ep0.c, line 456 drivers/usb/mtu3/mtu3_gadget_ep0.c, line 462 drivers/usb/mtu3/mtu3_gadget_ep0.c, line 470 include/linux/usb/gadget.h, line 839