fib: remove a useless synchronize_rcu() call

fib_nl_delrule() calls synchronize_rcu() for no apparent reason,
while rtnl is held.

I suspect it was done to avoid an atomic_inc_not_zero() in
fib_rules_lookup(), which commit 7fa7cb7109d07 added anyway.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 21698f8..1bc3f25 100644 (file)
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -494,7 +494,6 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
                        }
                }
 
-               synchronize_rcu();
                notify_rule_change(RTM_DELRULE, rule, ops, nlh,
                                   NETLINK_CB(skb).pid);
                fib_rule_put(rule);