Mainline UML Rust stable io.rs unused imports

[Johannes Berg]

On Sun, 2026-02-15 at 13:47 +0100, Miguel Ojeda wrote:
> Hi all,
> 
> In mainline and next, for UML with Rust stable (but not with Rust
> minimum), I am seeing:
> 
>       RUSTC L rust/kernel.o - due to target missing
>     error: unused import: `define_read`
>        --> rust/kernel/io.rs:229:16
>         |
>     229 | pub(crate) use define_read;
>         |                ^^^^^^^^^^^
>         |
>         = note: `-D unused-imports` implied by `-D warnings`
>         = help: to override `-D warnings` add `#[allow(unused_imports)]`
> 
>     error: unused import: `define_write`
>        --> rust/kernel/io.rs:262:16
>         |
>     262 | pub(crate) use define_write;
>         |                ^^^^^^^^^^^

Not sure I understand, the cfg() seems to only be fore 64-bit, but it
_is_ possible to build UML without IO accessors at all, since it's just
virtual, but I don't see how that would reflect in io.rs.

Not sure I can say anything else about it, sorry.

johannes