netdev - [PATCH net-next] ipv6: remove a rcu_read_lock in ndisc

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Date:	Tue, 4 Oct 2011 13:43:35 +0800
From:	<rongqing.li@...driver.com>
To:	<netdev@...r.kernel.org>
Subject: [PATCH net-next] ipv6: remove a rcu_read_lock in ndisc_constructor

From: Roy.Li <rongqing.li@...driver.com>

in6_dev_get(dev) takes a reference on struct inet6_dev, we dont need
rcu locking in ndisc_constructor()

Signed-off-by: Roy.Li <rongqing.li@...driver.com>
---
 net/ipv6/ndisc.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 9da6e02..dd633ff 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -370,17 +370,14 @@ static int ndisc_constructor(struct neighbour *neigh)
 	struct neigh_parms *parms;
 	int is_multicast = ipv6_addr_is_multicast(addr);
 
-	rcu_read_lock();
 	in6_dev = in6_dev_get(dev);
 	if (in6_dev == NULL) {
-		rcu_read_unlock();
 		return -EINVAL;
 	}
 
 	parms = in6_dev->nd_parms;
 	__neigh_parms_put(neigh->parms);
 	neigh->parms = neigh_parms_clone(parms);
-	rcu_read_unlock();
 
 	neigh->type = is_multicast ? RTN_MULTICAST : RTN_UNICAST;
 	if (!dev->header_ops) {
-- 
1.7.1

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