HelenOS sources

ed_tail_td        222 uspace/drv/bus/usb/ohci/ohci_batch.c 	assert(addr_to_phys(ohci_ep->tds[0]) == ed_tail_td(ohci_ep->ed));
ed_tail_td        223 uspace/drv/bus/usb/ohci/ohci_batch.c 	assert(ed_tail_td(ohci_ep->ed) == ed_head_td(ohci_ep->ed));