[ovs-dev] [PATCH net-next] net: ovs: use CRC32 accelerated flow hash if available

[David Miller]

From: Thomas Graf <tgraf at redhat.com>
Date: Tue, 10 Dec 2013 21:47:48 +0100

> We were not sure whether the runtime check, function pointer and
> hardware dependencies are something other subsystems that are less
> x86_64 centric would want to live with.

The things you are listing as implicit overhead can be eliminated
almost entirely using static branches.