[PATCH 3/3] ipv4: initialize ra_mutex in inet_init_net()

[Kirill Tkhai <ktkhai@virtuozzo.com>]

From: Cong Wang <xiyou.wangcong@gmail.com>

ra_mutex is a IPv4 specific mutex, it is inside struct netns_ipv4,
but its initialization is in the generic netns code, setup_net().

Move it to IPv4 specific net init code, inet_init_net().

Fixes: d9ff3049739e ("net: Replace ip_ra_lock with per-net mutex")
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Kirill Tkhai <ktkhai@virtuozzo.com>
---
 net/core/net_namespace.c |    1 -
 net/ipv4/af_inet.c       |    2 ++
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 670c84b1bfc2..b272ccfcbf63 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -308,7 +308,6 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
 	net->user_ns = user_ns;
 	idr_init(&net->netns_ids);
 	spin_lock_init(&net->nsid_lock);
-	mutex_init(&net->ipv4.ra_mutex);
 
 	list_for_each_entry(ops, &pernet_list, list) {
 		error = ops_init(ops, net);
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index bbd3a072ffea..d4623144e237 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1818,6 +1818,8 @@ static __net_init int inet_init_net(struct net *net)
 	net->ipv4.sysctl_igmp_llm_reports = 1;
 	net->ipv4.sysctl_igmp_qrv = 2;
 
+	mutex_init(&net->ipv4.ra_mutex);
+
 	return 0;
 }