Re: [PATCH net 1/2] vxlan: avoid using stale vxlan socket.

[Stephen Hemminger]

On Thu, 27 Oct 2016 11:51:55 -0700
Pravin B Shelar <pshe...@ovn.org> wrote:

> -     vxlan->vn4_sock = NULL;
> +     rcu_assign_pointer(vxlan->vn4_sock, NULL);
>  #if IS_ENABLED(CONFIG_IPV6)
> -     vxlan->vn6_sock = NULL;
> +     rcu_assign_pointer(vxlan->vn6_sock, NULL);
>       if (ipv6 || metadata)

User RCU_INIT_POINTER when setting pointer to NULL.
It avoids unnecessary barrier.