From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Date: Wed, 28 Dec 2016 14:13:24 -0500

The skb tc_verd field takes up two bytes but uses far fewer bits.
Convert the remaining use cases to bitfields that fit in existing
holes (depending on config options) and potentially save the two
bytes in struct sk_buff.

I like the looks of this, for sure :-)