From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH net 1/2] vxlan: avoid using stale vxlan socket.
Date: Thu, 27 Oct 2016 16:02:19 -0700
Message-ID: <20161027160219.06a946f4@xeon-e3>
References: <1477594316-118234-1-git-send-email-pshelar@ovn.org>
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Cc: netdev@vger.kernel.org
To: Pravin B Shelar <pshelar@ovn.org>
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On Thu, 27 Oct 2016 11:51:55 -0700
Pravin B Shelar <pshelar@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.