t4_init_ppod_region
rc = t4_init_ppod_region(pr, &sc->vres.iscsi, r, "iSCSI page pods");
rc = t4_init_ppod_region(&td->pr, &sc->vres.ddp,
int t4_init_ppod_region(struct ppod_region *, struct t4_range *, u_int,