From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next v5 3/3] act_vlan: VLAN action rewrite to use
 RCU lock/unlock and update
Date: Thu, 02 Nov 2017 17:00:05 +0900 (KST)
Message-ID: <20171102.170005.1755683020318904615.davem@davemloft.net>
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From: Manish Kurup <kurup.manish@gmail.com>
Date: Wed,  1 Nov 2017 17:46:21 -0400

> -	v->tcfv_push_proto = push_proto;
> +	ASSERT_RTNL();
> +	p = kzalloc(sizeof(*p), GFP_KERNEL);
> +	if (!p) {
> +		if (ovr)
> +			tcf_idr_release(*a, bind);
> +		return -ENOMEM;
> +	}
>  
>  	v->tcf_action = parm->action;
>  
> -	spin_unlock_bh(&v->tcf_lock);
> +	p_old = rtnl_dereference(v->vlan_p);
> +
> +	p->tcfv_action = action;
> +	p->tcfv_push_vid = push_vid;
> +	p->tcfv_push_prio = push_prio;
> +	p->tcfv_push_proto = push_proto;
> +
> +	rcu_assign_pointer(v->vlan_p, p);
> +
> +	if (p_old)
> +		kfree_rcu(p_old, rcu);

What frees this RCU memory when the VLAN action is destroyed?