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Commit 99469c32 authored by xeb@mail.ru's avatar xeb@mail.ru Committed by David S. Miller
Browse files

l2tp: avoid to use synchronize_rcu in tunnel free function 



Avoid to use synchronize_rcu in l2tp_tunnel_free because context may be
atomic.

Signed-off-by: default avatarDmitry Kozlov <xeb@mail.ru>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e2c53be2

net/l2tp/l2tp_core.c

+1 −2
Original line number Diff line number Diff line
@@ -1347,11 +1347,10 @@ static void l2tp_tunnel_free(struct l2tp_tunnel *tunnel) 
	/* Remove from tunnel list */

	spin_lock_bh(&pn->l2tp_tunnel_list_lock);

	list_del_rcu(&tunnel->list);

	kfree_rcu(tunnel, rcu);

	spin_unlock_bh(&pn->l2tp_tunnel_list_lock);

	synchronize_rcu();



	atomic_dec(&l2tp_tunnel_count);

	kfree(tunnel);

}



/* Create a socket for the tunnel, if one isn't set up by

net/l2tp/l2tp_core.h

+1 −0
Original line number Diff line number Diff line
@@ -163,6 +163,7 @@ struct l2tp_tunnel_cfg { 


struct l2tp_tunnel {

	int			magic;		/* Should be L2TP_TUNNEL_MAGIC */

	struct rcu_head rcu;

	rwlock_t		hlist_lock;	/* protect session_hlist */

	struct hlist_head	session_hlist[L2TP_HASH_SIZE];

						/* hashed list of sessions,