On Tue, 21 May 2019 08:15:36 +0200
Jiri Pirko <jiri@xxxxxxxxxxx> wrote:
> + if (static_branch_unlikely(&generic_xdp_needed_key)) {
> + int ret2;
> +
> + preempt_disable();
> + rcu_read_lock();
> + ret2 = do_xdp_generic(rcu_dereference(skb->dev->xdp_prog), skb);
> + rcu_read_unlock();
> + preempt_enable();
> +
> + if (ret2 != XDP_PASS)
> + return NET_RX_DROP;
> + }
> +
rcu_read_lock is already held by callers of __netif_receive_skb_core
