High resolution timer updates and x86_64 support - V3

The following patch series contains:

- dyntick bugfixes for -mm (caused by the cpuidle changes in ACPI)

- updates and improvements to high resolution timer / dynticks 

- high resolution timer / dynticks support for x86_64

The x86_64 support is based on an initial patch from Chris Wright. Thanks Chris !

The overall diffstat of the patchset is:
 50 files changed, 843 insertions(+), 1477 deletions(-)

The patch set has been tested in the -hrt and -rt trees for quite a while
and the initial problems have been sorted out. Thanks to the folks from the
PowerTop project for testing and feedback.

Changes since V2:

- dropped clocksource settimeofday hook for PPC
- fixed compile breakage of vmiclock
- coding style fixups
- better patch split


The patch series is also available from the hrtimers project site:

http://www.tglx.de/projects/hrtimers/2.6.22-rc4-mm2/patch...
http://www.tglx.de/projects/hrtimers/2.6.22-rc4-mm2/patch...

Note: these patches also contain the recently posted HPET force enable
series from Venki.

Thanks,

	tglx
--