[PATCH RESEND 3/3] net: Remove spinlock from get_net_ns_by_id()
From: Kirill Tkhai <hidden>
Date: 2017-12-29 07:30:16
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
idr_find() is safe under rcu_read_lock() and maybe_get_net() guarantees that net is alive. Signed-off-by: Kirill Tkhai <redacted> --- 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 6a4eab438221..a675f35a18ff 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c@@ -279,11 +279,9 @@ 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;