ipv6: use call_rcu_hurry() in fib6_info_release()

This is a followup of commit c4e86b43 ("net: add two more
call_rcu_hurry()")

fib6_info_destroy_rcu() is calling nexthop_put() or fib6_nh_release()

We must not delay it too much or risk unregister_netdevice/ref_tracker
traces because references to netdev are not released in time.

This should speedup device/netns dismantles when CONFIG_RCU_LAZY=y
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ip6_fib.h

@@ -338,7 +338,7 @@ static inline void fib6_info_release(struct fib6_info *f6i)
 {
 	if (f6i && refcount_dec_and_test(&f6i->fib6_ref)) {
 		DEBUG_NET_WARN_ON_ONCE(!hlist_unhashed(&f6i->gc_link));
-		call_rcu(&f6i->rcu, fib6_info_destroy_rcu);
+		call_rcu_hurry(&f6i->rcu, fib6_info_destroy_rcu);
 	}
 }