[RFC/PATCH] Make powerpc64 use __thread for per-cpu variables

[David S. Miller]

From: Olof Johansson <olof at lixom.net>
Date: Wed, 10 May 2006 00:16:50 -0500

> It would be interesting to see benchmarks of how much it improves
> things. I guess it doesn't really get interesting until after the paca
> gets removed though, due to the added mfsprg's.

When I moved the per-cpu base into a fixed register on sparc64,
it definitely showed up on the micro-benchmarks because this
shrunk the .text a lot in that case.