[PATCH] nomadik: prevent sched_clock() wraparound

[Russell King - ARM Linux]

On Wed, Nov 17, 2010 at 09:34:56AM +0100, Linus Walleij wrote:
> And the Tegra code in mach-tegra/timer.c:
> 
> static cycle_t tegra_clocksource_read(struct clocksource *cs)
> {
>         return cnt32_to_63(timer_readl(TIMERUS_CNTR_1US));
> }
> 
> This just won't fly for long either, the mult for the clocksource is
> usually something in the order of 20.

I thought John/Thomas said that using cnt32_to_63 in there wasn't a good
idea - sounds like it needs to be killed.  Colin?