Subject: [PATCH v2 net-next] fib_trie: remove duplicated rcu lock

From: [email-masked]
Date: Sun, 13 Oct 2013 19:50:09 +0800

From: "baker.zhang" <[email-masked]>

fib_table_lookup has included the rcu lock protection.

Signed-off-by: baker.zhang <[email-masked]>
---
Thanks for Eric Dumazet's review.
The V1 patch remove a necessary rcu read lock.

 net/ipv4/fib_frontend.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index b3f627a..d846304 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -933,7 +933,6 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb)
 		local_bh_disable();
 
 		frn->tb_id = tb->tb_id;
-		rcu_read_lock();
 		frn->err = fib_table_lookup(tb, &fl4, &res, FIB_LOOKUP_NOREF);
 
 		if (!frn->err) {
@@ -942,7 +941,6 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb)
 			frn->type = res.type;
 			frn->scope = res.scope;
 		}
-		rcu_read_unlock();
 		local_bh_enable();
 	}
 }
-- 
1.8.1.2