[GIT PULL] scalable TWD localtimer

Linus,

On 6/3/2011 3:31 AM, Linus Walleij wrote:

Hi Russell,

please consider pulling this for the -rc series since I see this as a
horrible bug that Thomas just fixed the infrastructure to properly
counter the week before the merge window.

You probably know the story but basically there is one clockline
into the ARM-supplied MPCore thing, and it inevitably also clocks
the TWD. Sadly that includes the localtimer, which will make all
clockevents scale in both directions, firing too late or too early
as compared to desired wall-clock time (or system clocksource) as
the clock speed of the core is changed. Right now there is no
compensation whatsoever for this so to run the system reliably
on v3.0-rc1, cpufreq has to be disabled.

Thomas and Colin did the grunt work, I added a scaling smp_twd
clock reflecting the Ux500 cpufreq changes, and now it is rock solid
as far as I can tell.

Hope the pull is already not done. If not I would like to submit the
OMAP clock change as well along with this series and may be Colin might
want to do the same for Tegra.

Regards
Santosh