Re: [PATCH v3] rust: macros: improve `#[vtable]` documentation

[Andreas Hindborg]

Benno Lossin <benno.lossin@xxxxxxxxx> writes:

> Traits marked with `#[vtable]` need to provide default implementations
> for optional functions. The C side represents these with `NULL` in the
> vtable, so the default functions are never actually called. We do not
> want to replicate the default behavior from C in Rust, because that is
> not maintainable. Therefore we should use `build_error` in those default
> implementations. The error message for that is provided at
> `kernel::error::VTABLE_DEFAULT_ERROR`.
>
> Signed-off-by: Benno Lossin <benno.lossin@xxxxxxxxx>

Reviewed-by: Andreas Hindborg <a.hindborg@xxxxxxxxxxx>