Re: [PATCH] rust: types: add FOREIGN_ALIGN to ForeignOwnable

[Danilo Krummrich <dakr@kernel.org>]

On 6/5/25 9:55 PM, Andreas Hindborg wrote:
> The current implementation of `ForeignOwnable` is leaking the type of the
> opaque pointer to consumers of the API. This allows consumers of the opaque
> pointer to rely on the information that can be extracted from the pointer
> type.
> 
> To prevent this, change the API to the version suggested by Maira
> Canal (link below): Remove `ForeignOwnable::PointedTo` in favor of a
> constant, which specifies the alignment of the pointers returned by
> `into_foreign`.
> 
> Suggested-by: Alice Ryhl <aliceryhl@google.com>
> Suggested-by: Maíra Canal <mcanal@igalia.com>
> Link: https://lore.kernel.org/r/20240309235927.168915-3-mcanal@igalia.com
> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>

I think having the pointer type be `crate::ffi::c_void` was much more convenient
for users of the API anyways. :)

	Acked-by: Danilo Krummrich <dakr@kernel.org>