[PATCH] cpuidle/powernv: Fix snooze timeout

[Balbir Singh]

>> This is still a rounding error but at a different site. I see we saved
>> a division by doing a >> 10, but we added it right back by doing a /20
>> later in the platform code.
>
> While a >> 10 is done at every idle exit, div by 20 is done once during
> boot, so this doesn't negate the previous optimization.
>

Yes, fair point

>> Shouldn't the rounding affect other
>> platforms as well? Can't we fix it in cpuidle_enter_state().
>
> This does affect all platforms, but I'm guessing no other place relied
> on the precision of last_residency calculations.
> Daniel can perhaps comment on this.
>