gmap_mkold_prefix
if (!pgste.prefix_notif || gmap_mkold_prefix(p->gmap, gfn, end)) {
if (crste_prefix(crste) && !gmap_mkold_prefix(priv->gmap, gfn, end))
if (!pgste.prefix_notif || gmap_mkold_prefix(gmap, gfn, gfn + 1)) {
if (crste.s.fc1.prefix_notif && !gmap_mkold_prefix(gmap, gfn, end))