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ipv4: remove nested rcu_read_lock/unlock 

ip_local_deliver_finish() already have a rcu_read_lock/unlock, so
the rcu_read_lock/unlock is unnecessary.

See the stack below:
ip_local_deliver_finish
	|
	|
	->icmp_rcv
		|
		|
		->icmp_socket_deliver

Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Duan Jiong 2014-08-01 14:00:36 +08:00 committed by David S. Miller
parent e339756c99
commit 188b1210f3
1 changed files with 0 additions and 2 deletions
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2
net/ipv4/icmp.c
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@ -670,11 +670,9 @@ static void icmp_socket_deliver(struct sk_buff *skb, u32 info)
raw_icmp_error(skb, protocol, info);
rcu_read_lock();
ipprot = rcu_dereference(inet_protos[protocol]);
if (ipprot && ipprot->err_handler)
ipprot->err_handler(skb, info);
rcu_read_unlock();
}
static bool icmp_tag_validation(int proto)