HelenOS sources

xhci_bus_fini      53 uspace/drv/bus/usb/xhci/bus.h extern void xhci_bus_fini(xhci_bus_t *);
xhci_bus_fini     738 uspace/drv/bus/usb/xhci/hc.c 	xhci_bus_fini(&hc->bus);
HelenOS homepage, sources at GitHub