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

[David S. Miller]

From: Paul Mackerras <paulus at samba.org>
Date: Thu, 11 May 2006 07:05:24 +1000

> No, Richard has a point, it's not the value that is the concern, it's
> the address, which gcc could assume is still valid after a barrier.
> Drat.

Oh right, and that's currently part of why we obfuscate the
address computation with the RELOC_HIDE() buisness.

Once we expose what's really going on with something like
__thread, gcc can now be "smart" about it.