netdev - [PATCH net-next 5/6] ipv6: __ipv6_dev_get

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Message-Id: <20171008023028.32071-6-edumazet@google.com>
Date:   Sat,  7 Oct 2017 19:30:27 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Subject: [PATCH net-next 5/6] ipv6: __ipv6_dev_get_saddr() rcu conversion

Callers hold rcu_read_lock(), so we do not need
the rcu_read_lock()/rcu_read_unlock() pair.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/ipv6/addrconf.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index ea63442209bf268f1a19b5e014cb8c7e34fd40b4..20c3ca777529fc49ebf749ca6f7d8c2451258d55 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1558,8 +1558,7 @@ static int __ipv6_dev_get_saddr(struct net *net,
 {
 	struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx];
 
-	read_lock_bh(&idev->lock);
-	list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
+	list_for_each_entry_rcu(score->ifa, &idev->addr_list, if_list) {
 		int i;
 
 		/*
@@ -1625,7 +1624,6 @@ static int __ipv6_dev_get_saddr(struct net *net,
 		}
 	}
 out:
-	read_unlock_bh(&idev->lock);
 	return hiscore_idx;
 }
 
-- 
2.14.2.920.gcf0c67979c-goog