From: Eric Dumazet <edumazet@google.com>
Date: Thu, 23 Jun 2022 04:34:39 +0000 (+0000)
Subject: ipmr: do not acquire mrt_lock in ipmr_get_route()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e4cd9868e8ec3691e6d94725c8b10edd1ec6eca2;p=linux.git

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 b0f2e6d79d622..69ccd3d7c655a 100644
--- 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;
 }