HelenOS sources

xhci_rh_start     511 uspace/drv/bus/usb/xhci/hc.c 	xhci_rh_start(&hc->rh);
xhci_rh_start      87 uspace/drv/bus/usb/xhci/rh.h extern void xhci_rh_start(xhci_rh_t *);
HelenOS homepage, sources at GitHub