Commit 190683a9 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: net_families __rcu annotations 



Use modern RCU API / annotations for net_families array.

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e85eb117

net/socket.c

+6 −5
Original line number Diff line number Diff line
@@ -156,7 +156,7 @@ static const struct file_operations socket_file_ops = { 
 */



static DEFINE_SPINLOCK(net_family_lock);

static const struct net_proto_family *net_families[NPROTO] __read_mostly;

static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly;



/*

 *	Statistics counters of the socket lists
@@ -1200,7 +1200,7 @@ int __sock_create(struct net *net, int family, int type, int protocol, 
	 * requested real, full-featured networking support upon configuration.

	 * Otherwise module support will break!

	 */

	if (net_families[family] == NULL)

	if (rcu_access_pointer(net_families[family]) == NULL)

		request_module("net-pf-%d", family);

#endif
@@ -2332,10 +2332,11 @@ int sock_register(const struct net_proto_family *ops) 
	}



	spin_lock(&net_family_lock);

	if (net_families[ops->family])

	if (rcu_dereference_protected(net_families[ops->family],

				      lockdep_is_held(&net_family_lock)))

		err = -EEXIST;

	else {

		net_families[ops->family] = ops;

		rcu_assign_pointer(net_families[ops->family], ops);

		err = 0;

	}

	spin_unlock(&net_family_lock);
@@ -2363,7 +2364,7 @@ void sock_unregister(int family) 
	BUG_ON(family < 0 || family >= NPROTO);



	spin_lock(&net_family_lock);

	net_families[family] = NULL;

	rcu_assign_pointer(net_families[family], NULL);

	spin_unlock(&net_family_lock);



	synchronize_rcu();