netdev - [PATCH net-next 09/19] ipmr: do not acquire mrt_lock in ipmr_get

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Message-Id: <20220622051255.700309-10-edumazet@google.com>
Date:   Wed, 22 Jun 2022 05:12:45 +0000
From:   Eric Dumazet <edumazet@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com,
        Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 09/19] 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@...gle.com>
---
 net/ipv4/ipmr.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index b0f2e6d79d62273c8c2682f28cb45fe5ec3df6f3..69ccd3d7c655a53d3cf1ac9104b9da94213416f6 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;
 }
-- 
2.37.0.rc0.104.g0611611a94-goog