arm: Request to preserve TPIDRURW per thread

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Hi,
that comes a bit late, but [1] asked for objections.
As you can see in [2] there are more and more applications coming to WinRT, Wine could support them,
but mostly they expect to have the thread environment block (TEB) in TPIDRURW.
This register must be preserved per thread and we have patches for that.

Currently there exist two kernel behaviours:

1. the kernel does not touch TPIDRURW at all ("covert channel")
2. the kernel clears TPIDRURW on thread switch

Attached to [3] you'll find kernel patches you can freely use.
Permission and more info you'll find in [4].
Any hints or suggestions?

[1] http://www.kernelhub.org/?p=2&msg=57979
[2] http://forum.xda-developers.com/showthread.php?t=2092348
[3] http://bugs.winehq.org/show_bug.cgi?id=31322
[4] http://bugs.winehq.org/show_bug.cgi?id=31308
-- 

Best Regards, André Hentschel
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