static void pep_sock_unhash(struct sock *sk)
{
	struct pep_sock *pn = pep_sk(sk);
	struct sock *skparent = NULL;

	lock_sock(sk);

	if (pn->listener != NULL) {
		skparent = pn->listener;
		pn->listener = NULL;
		release_sock(sk);

		pn = pep_sk(skparent);
		lock_sock(skparent);
		sk_del_node_init(sk);
		sk = skparent;
	}

	/* Unhash a listening sock only when it is closed
	 * and all of its active connected pipes are closed. */
	if (hlist_empty(&pn->hlist))
		pn_sock_unhash(&pn->pn_sk.sk);
	release_sock(sk);

	if (skparent)
		sock_put(skparent);
}

void raw_unhash_sk(struct sock *sk)
{
	struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;

	write_lock_bh(&h->lock);
	if (sk_del_node_init(sk))
		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
	write_unlock_bh(&h->lock);
}

void atm_dev_release_vccs(struct atm_dev *dev)
{
	int i;

	write_lock_irq(&vcc_sklist_lock);
	for (i = 0; i < VCC_HTABLE_SIZE; i++) {
		struct hlist_head *head = &vcc_hash[i];
		struct hlist_node *node, *tmp;
		struct sock *s;
		struct atm_vcc *vcc;

		sk_for_each_safe(s, node, tmp, head) {
			vcc = atm_sk(s);
			if (vcc->dev == dev) {
				vcc_release_async(vcc, -EPIPE);
				sk_del_node_init(s);
			}
		}
	}

static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
{
	struct pep_sock *pn = pep_sk(sk);
	struct sock *newsk = NULL;
	struct sk_buff *oskb;
	int err;

	lock_sock(sk);
	err = pep_wait_connreq(sk, flags & O_NONBLOCK);
	if (err)
		goto out;

	newsk = __sk_head(&pn->ackq);

	oskb = skb_dequeue(&newsk->sk_receive_queue);
	err = pep_accept_conn(newsk, oskb);
	if (err) {
		skb_queue_head(&newsk->sk_receive_queue, oskb);
		newsk = NULL;
		goto out;
	}
	kfree_skb(oskb);

	sock_hold(sk);
	pep_sk(newsk)->listener = sk;

	sock_hold(newsk);
	sk_del_node_init(newsk);
	sk_acceptq_removed(sk);
	sk_add_node(newsk, &pn->hlist);
	__sock_put(newsk);

out:
	release_sock(sk);
	*errp = err;
	return newsk;
}

/* associated socket ceases to exist */
static void pep_sock_close(struct sock *sk, long timeout)
{
	struct pep_sock *pn = pep_sk(sk);
	int ifindex = 0;

	sk_common_release(sk);

	lock_sock(sk);
	if (sk->sk_state == TCP_LISTEN) {
		/* Destroy the listen queue */
		struct sock *sknode;
		struct hlist_node *p, *n;

		sk_for_each_safe(sknode, p, n, &pn->ackq)
			sk_del_node_init(sknode);
		sk->sk_state = TCP_CLOSE;
	}
	ifindex = pn->ifindex;
	pn->ifindex = 0;
	release_sock(sk);

	if (ifindex)
		gprs_detach(sk);
}

static void vcc_remove_socket(struct sock *sk)
{
	write_lock_irq(&vcc_sklist_lock);
	sk_del_node_init(sk);
	write_unlock_irq(&vcc_sklist_lock);
}

static void nr_remove_socket(struct sock *sk)
{
	spin_lock_bh(&nr_list_lock);
	sk_del_node_init(sk);
	spin_unlock_bh(&nr_list_lock);
}

static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk)
{
	write_lock_bh(&l->lock);
	sk_del_node_init(sk);
	write_unlock_bh(&l->lock);
}