SYSCTL_PFX_INT
SYSCTL_PFX_INT(sc->sc_, __rw, __name, __descr)
if ((rc = SYSCTL_PFX_INT(osc->ath_, CTLFLAG_READWRITE, smoothing_rate,
if ((rc = SYSCTL_PFX_INT(osc->ath_, CTLFLAG_READWRITE, sample_rate,