ipmr: do not acquire mrt_lock in ipmr_get_route()

mr_fill_mroute() uses standard rcu_read_unlock(),
no need to grab mrt_lock anymore.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index b0f2e6d..69ccd3d 100644 (file)
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -2289,9 +2289,7 @@ int ipmr_get_route(struct net *net, struct sk_buff *skb,
                return err;
        }
 
-       read_lock(&mrt_lock);
        err = mr_fill_mroute(mrt, skb, &cache->_c, rtm);
-       read_unlock(&mrt_lock);
        rcu_read_unlock();
        return err;
 }