PTN_ISROOT_P
&& (PTN_ISROOT_P(pt, id.id_parent)
KASSERT(PTN_ISROOT_P(pt, parent) || PTN_BRANCH_BITOFF(parent) + PTN_BRANCH_BITLEN(parent) == bitoff);
if (__predict_false(PTN_ISROOT_P(pt, parent))) {