rust: io: implement `Io` on reference types instead

Currently, `Io` is implemented on owned I/O objects (e.g. `Bar`). This is
going to change with I/O projections, as then `Io` needs to work both for
owned objects and views of them. Views are themselves reference-like
(however they obviously cannot be references, because they belong to a
different address space).

To facilitate the change, change `Io` to be implemented on reference types
for the owned I/O objects, and make methods take `self` instead of `&self`.
When I/O views are implemented, we can then naturally implement `Io` for
these objects.

Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Link: https://patch.msgid.link/20260706-io_projection-v6-4-72cd5d055d54@garyguo.net
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

0 files changed, 0 insertions, 0 deletions