Re: [PATCH v2 4/4] rust: devres: implement register_release()

[Danilo Krummrich <dakr@kernel.org>]

On Sun, Jun 22, 2025 at 10:47:55PM +0200, Benno Lossin wrote:
> On Sun Jun 22, 2025 at 6:40 PM CEST, Danilo Krummrich wrote:
> > +impl<T: Release> Release for crate::sync::ArcBorrow<'_, T> {
> > +    fn release(&self) {
> > +        self.deref().release();
> > +    }
> > +}
> > +
> > +impl<T: Release> Release for Pin<&'_ T> {
> 
> You don't need the `'_` here.
> 
> > +    fn release(&self) {
> > +        self.deref().release();
> > +    }
> > +}
> 
> I still think we're missing a `impl<T: Release> Release for &T`.

Yeah, I really thought the compile can figure this one out.

> And maybe a closure design is better, depending on how much code is
> usually run in `release`, if it's a lot, then we should use the trait
> design. If it's only 1-5 lines, then a closure would also be fine. I
> don't have a strong preference, but if it's mostly one liners, then
> closures would be better.

It should usually be rather short, so probably makes sense.

> If you keep the trait design & we resolve the `&T: Release` question:
> 
> Reviewed-by: Benno Lossin <lossin@kernel.org>
> 
> ---
> Cheers,
> Benno