Re: [PATCH 1/4] rust: alloc: replace aligned_size() with Kmalloc::aligned_layout()

["Danilo Krummrich" <dakr@kernel.org>]

On Sat Aug 16, 2025 at 10:40 PM CEST, Miguel Ojeda wrote:
> On Thu, Jul 31, 2025 at 5:49 PM Danilo Krummrich <dakr@kernel.org> wrote:
>>
>> +impl Kmalloc {
>> +    /// Returns a [`Layout`] that makes [`Kmalloc`] fulfill the requested size and alignment of
>> +    /// `layout`.
>> +    pub const fn aligned_layout(layout: Layout) -> Layout {
>
> I think this `const fn` here was removed when applying to make it work
> with older compilers, right?

Yes, that's correct.

> I was fixing another `rusttest` thing and noticed while applying
> these. I had a patch to fix it, since we can actually just use the
> feature, and then I noticed it wasn't in the tree. Since I have it, I
> am attaching it for reference in case the now-stable feature is
> needed, e.g. if you want to make that `const fn` again.

I think it doesn't add much value for this to be a const function anyways, but
maybe it is more useful elsewhere? In that case, I think it also doesn't hurt
to Kmalloc::aligned_layout() const again.