Re: [PATCH v3 6/7] rust: pci: return DevresLt from Bar::into_devres()

[Alexandre Courbot]

On Fri Jun 19, 2026 at 8:08 AM JST, Danilo Krummrich wrote:
> Implement ForLt and CovariantForLt for Bar<'static, SIZE> so that
> DevresLt can shorten the stored 'static lifetime back to the caller's
> borrow lifetime.
>
> CovariantForLt is sound because Bar<'a, SIZE> only holds &'a
> Device<Bound>, which is covariant over 'a.
>
> Since DevresLt::new() handles the lifetime transmutation internally,
> into_devres() no longer needs an explicit transmute to Bar<'static>.
>
> Add a DevresBar<SIZE> type alias for convenience.
>
> Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>

Reviewed-by: Alexandre Courbot <acourbot@xxxxxxxxxx>