linux-kernel - [PATCH 3.16 287/410] l2tp: remove l2tp_tunnel_count and l2tp_session

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Date:   Thu, 07 Jun 2018 15:05:21 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "David S. Miller" <davem@...emloft.net>,
        "Guillaume Nault" <g.nault@...halink.fr>
Subject: [PATCH 3.16 287/410] l2tp: remove l2tp_tunnel_count and
 l2tp_session_count

3.16.57-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Guillaume Nault <g.nault@...halink.fr>

commit c7fa745d988812c4dea7dbc645f025c5bfa4917e upstream.

These variables have never been used.

Signed-off-by: Guillaume Nault <g.nault@...halink.fr>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/l2tp/l2tp_core.c | 10 ----------
 1 file changed, 10 deletions(-)

--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -99,8 +99,6 @@ struct l2tp_skb_cb {
 
 #define L2TP_SKB_CB(skb)	((struct l2tp_skb_cb *) &skb->cb[sizeof(struct inet_skb_parm)])
 
-static atomic_t l2tp_tunnel_count;
-static atomic_t l2tp_session_count;
 static struct workqueue_struct *l2tp_wq;
 
 /* per-net private data for this module */
@@ -419,10 +417,6 @@ int l2tp_session_register(struct l2tp_se
 	hlist_add_head(&session->hlist, head);
 	write_unlock_bh(&tunnel->hlist_lock);
 
-	/* Ignore management session in session count value */
-	if (session->session_id != 0)
-		atomic_inc(&l2tp_session_count);
-
 	return 0;
 
 err_tlock_pnlock:
@@ -1327,7 +1321,6 @@ static void l2tp_tunnel_destruct(struct
 	spin_lock_bh(&pn->l2tp_tunnel_list_lock);
 	list_del_rcu(&tunnel->list);
 	spin_unlock_bh(&pn->l2tp_tunnel_list_lock);
-	atomic_dec(&l2tp_tunnel_count);
 
 	l2tp_tunnel_closeall(tunnel);
 
@@ -1749,7 +1742,6 @@ int l2tp_tunnel_create(struct net *net,
 
 	/* Add tunnel to our list */
 	INIT_LIST_HEAD(&tunnel->list);
-	atomic_inc(&l2tp_tunnel_count);
 
 	/* Bump the reference count. The tunnel context is deleted
 	 * only when this drops to zero. Must be done before list insertion
@@ -1795,8 +1787,6 @@ void l2tp_session_free(struct l2tp_sessi
 
 	if (tunnel) {
 		BUG_ON(tunnel->magic != L2TP_TUNNEL_MAGIC);
-		if (session->session_id != 0)
-			atomic_dec(&l2tp_session_count);
 		sock_put(tunnel->sock);
 		session->tunnel = NULL;
 		l2tp_tunnel_dec_refcount(tunnel);