be7724cdbbca ("rust: specify when `ARef` is thread safe")
f1fbd6a864d4 ("rust: introduce `ARef`")
4d4692a2ff83 ("rust: types: introduce `ScopeGuard`")
b9ecf9b9ac59 ("rust: types: add `Opaque` type")
ba20915bae49 ("rust: types: add `Either` type")
247b365dc8dc ("rust: add `kernel` crate")