From 42157277af17d5c05946c700eb03877d60760d3c Mon Sep 17 00:00:00 2001 From: Kirill Tkhai Date: Tue, 16 Jan 2018 12:31:54 +0300 Subject: [PATCH] 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: Kirill Tkhai Signed-off-by: David S. Miller --- net/core/net_namespace.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 3c77d84ad60d..1ccb953b3b09 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -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;