rust: doctest: add LocalModule fallback for #[vtable] ThisModule

Add a `LocalModule` struct with a null-pointer `ModuleMetadata` impl
in the doctest harness, so that `crate::LocalModule` (auto-inserted
by `#[vtable]`) resolves correctly when there is no `module!` macro.

Assisted-by: opencode:glm-5.2
Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Gary Guo <gary@garyguo.net>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Alvin Sun <alvin.sun@linux.dev>
Link: https://patch.msgid.link/20260811-fix-fops-owner-v10-3-7e71776f9dbe@linux.dev
[ Fixed `clippy::undocumented_unsafe_blocks` lint by wrapping with
  a block. Added interim `#[allow(dead_code)]`. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Alvin Sun 2026-08-11 14:39:45 +08:00 • committed by Miguel Ojeda
commit 98f256e272