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Commit 42157277 authored by Kirill Tkhai's avatar Kirill Tkhai Committed by David S. Miller
Browse files

net: Remove spinlock from get_net_ns_by_id() 



idr_find() is safe under rcu_read_lock() and
maybe_get_net() guarantees that net is alive.

Signed-off-by: default avatarKirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0c06bea9

net/core/net_namespace.c

+0 −2
Original line number Diff line number Diff line
@@ -273,11 +273,9 @@ struct net *get_net_ns_by_id(struct net *net, int id) 
		return NULL;



	rcu_read_lock();

	spin_lock_bh(&net->nsid_lock);

	peer = idr_find(&net->netns_ids, id);

	if (peer)

		peer = maybe_get_net(peer);

	spin_unlock_bh(&net->nsid_lock);

	rcu_read_unlock();



	return peer;