Re: [PATCH v10 1/3] lib: Add strongly typed 64bit int_sqrt

[Peter Zijlstra]

On Wed, Dec 20, 2017 at 02:39:26PM +0000, David Laight wrote:

> With minor changes it ought to be possible to remove most of the
> 64bit arithmetic and shifts.
> 
> If you care about performance then using 32 bit maths will be much faster.

Some, u64 add/sub/shift isn't exactly expensive, but yes, I also
indicated that improvement is possible. At the very least y can be made
a u32 I suppose.