From: Cong Wang <redacted>
Date: Wed, 31 Jul 2013 11:13:22 +0800

I know saving 8 bytes is not interesting for you, but it is for me,
since I need some room in struct tcp_metrics_block for union inet_addr.
With this patch, I don't have to make struct tcp_metrics_block expand to
3 cachelines. :)

Cong, please.

Instead of making code accomodate an unnecessarily large "union
inet_addr", make a small version of it that accomodates this use case
and doesn't have the extra fields.