[PATCH v4 04/20] rust: add new `num` module with useful integer operations

[Benno Lossin]

On Mon Jun 2, 2025 at 11:39 AM CEST, Danilo Krummrich wrote:
> On Thu, May 29, 2025 at 09:27:33AM +0200, Benno Lossin wrote:
>> That's also fair, but we lose the constness of `next_multiple_of`, so
>> you can't use `align_up` in a const function. That might confuse people
>> and then they write their own const helper function... I'd prefer we use
>> all functions that are available in the stdlib.
>
> Considering that, what's the suggestion for this trait?
>
> I don't think we should have a trait with align_down() and fls() only and
> otherwise use next_multiple_of(), i.e. mix things up.

Agreed.

> I think we should either align with the Rust nomenclature - whatever this means
> for fls() - or implement the trait with all three methods.

The longterm perspective would be to choose the Rust one. But I'd also
understand if people want the kernel's own terms used. Still I prefer
the Rust ones :)

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Cheers,
Benno