fd_p
fd_p fd = xfd;
fd_p fd = xfd;
fd_turnon(fd_p fd)
fd_p fd;
fd_p fd;
fd_p fd;
fdc->fd = (fd_p) 0;
fdc->fd = (fd_p) 0;
fdc->fd = (fd_p) 0;
fd_p fd;
fd_p fd = devclass_get_softc(fd_devclass, fdu);