From b4772ef879a8f7d8c56118c2ae5a296fcf6f81d2 Mon Sep 17 00:00:00 2001
From: Eyal Birger <eyal.birger@gmail.com>
Date: Sun, 1 Mar 2015 14:58:29 +0200
Subject: [PATCH] net: use common macro for assering skb->cb[] available size
 in protocol families

As part of an effort to move skb->dropcount to skb->cb[] use a common
macro in protocol families using skb->cb[] for ancillary data to
validate available room in skb->cb[].

Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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