linux-kernel - [PATCH v4 16/16] rust: clippy: disable `addr_of[

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Message-ID: <20250316061429.817126-17-contact@antoniohickey.com>
Date: Sun, 16 Mar 2025 02:14:25 -0400
From: Antonio Hickey <contact@...e-forge.io>
To: Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>
Cc: Antonio Hickey <contact@...oniohickey.com>,
	rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 16/16] rust: clippy: disable `addr_of[_mut]!` macros

With the `raw_ref_op` feature enabled we no longer want to
allow use of `addr_of!` and `addr_of_mut!` macros.

We instead want to use `&raw` and `&raw mut` to get raw
pointers to a place.

Note that this lint isn't currently reliable, but we enable
it nevertheless because:
1. Document that one shouldn't use the `addr_of[_mut]!` macros.
2. When the lint becomes useful we will already have it enabled.

Suggested-by: Benno Lossin <benno.lossin@...ton.me>
Link: https://github.com/Rust-for-Linux/linux/issues/1148
Link: https://github.com/rust-lang/rust-clippy/issues/11431
Signed-off-by: Antonio Hickey <contact@...oniohickey.com>
---
 .clippy.toml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.clippy.toml b/.clippy.toml
index 815c94732ed7..95c73959f039 100644
--- a/.clippy.toml
+++ b/.clippy.toml
@@ -8,4 +8,8 @@ disallowed-macros = [
     # The `clippy::dbg_macro` lint only works with `std::dbg!`, thus we simulate
     # it here, see: https://github.com/rust-lang/rust-clippy/issues/11303.
     { path = "kernel::dbg", reason = "the `dbg!` macro is intended as a debugging tool" },
+    # With `raw_ref_op` feature enabled we no longer want to allow use of `addr_of!`
+    # and `addr_of_mut!` macros, but instead use `&raw` or `&raw mut`.
+    { path = "core::ptr::addr_of_mut", reason = "use `&raw mut` instead `addr_of_mut!`" },
+    { path = "core::ptr::addr_of", reason = "use `&raw` instead `addr_of!`" },
 ]
-- 
2.48.1