xfrmi_hash
for_each_xfrmi_rcu(xfrmn->xfrmi[xfrmi_hash(x->if_id)], xi) {
struct xfrm_if __rcu **xip = &xfrmn->xfrmi[xfrmi_hash(xi->p.if_id)];
for (xip = &xfrmn->xfrmi[xfrmi_hash(xi->p.if_id)];
for (xip = &xfrmn->xfrmi[xfrmi_hash(p->if_id)];