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>
parent
2472d761
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