Re: [PATCH] lib/int_sqrt.c: optimize for small argument values

[Kees Cook]

On Thu, Oct 19, 2017 at 11:13 PM, Joe Perches <joe@xxxxxxxxxxx> wrote:
> On Thu, 2017-10-19 at 13:31 -0700, Michael Davidson wrote:
>> int_sqrt() currently takes approximately constant time
>> regardless of the value of the argument. By using the
>> magnitude of the operand to set the initial conditions
>> for the calculation the cost becomes proportional to
>> log2 of the argument with the worst case behavior not
>> being measurably slower than it currently is.
>
> https://lkml.org/lkml/2017/7/24/408

Ah! Cool. I don't see this version queued up for -next. Where does
Peter's version stand?

-Kees

-- 
Kees Cook
Pixel Security