Re: proposition for fixing Y292B bug

[Alexander Lobakin]

From: Bagas Sanjaya <bagasdotme@xxxxxxxxx>
Date: Mon, 1 Jul 2024 16:07:48 +0700

> On Sun, Jun 30, 2024 at 05:27:24PM +0200, David Polakovic wrote:
>> Thanks for reply.
> 
> Please don't top-post on LKML, reply inline with appropriate context
> instead.
> 
>>
>> My proposed solution was to create this BigInt datatype, which
>> stores the value in array. The functions for division, multiplication,
>> addition, subtraction and comparison could be stored in separate
>> ".h" library for manipulation with BigInt datatype. The paper speaks
>> more in detail.

IRRC there is big integer type somewhere in either lib/ or crypto/,
I don't remember exactly. It's used only for crypto tho.

>>
>> And yes, this truly is an userspace solution, but for kernel space
>> implementation I have zero to none experience. Therefore I wrote
>> here.
> 
> There was a proposal for adding 128-bit unsigned integer (see [1]).
> The signed counterpart should be analogous.

I have generic 128-bit integer API/infra for the kernel in my internal
repo. I've been planning to upstream it for a couple years already, but
every time couldn't find a slot to do that.
I can upload it to my open GitHub, so that maybe someone else who needs
it could pick it up?

> 
> Thanks.
> 
> [1]: https://lore.kernel.org/lkml/20220722145514.767592-1-alexandr.lobakin@xxxxxxxxx/

Thanks,
Olek