[PATCH v6 10/18] rust: sync: arc: refactor to use `&raw const`

From: Antonio Hickey
Date: Thu Apr 17 2025 - 21:44:39 EST


Replacing all occurrences of `addr_of!(place)` with
`&raw const place`.

This will allow us to reduce macro complexity, and improve consistency
with existing reference syntax as `&raw const` is similar to `&` making
it fit more naturally with other existing code.

Suggested-by: Benno Lossin <benno.lossin@xxxxxxxxx>
Link: https://github.com/Rust-for-Linux/linux/issues/1148
Signed-off-by: Antonio Hickey <contact@xxxxxxxxxxxxxxxxx>
---
rust/kernel/sync/arc.rs | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
index 8484c814609a..fea85e5342a0 100644
--- a/rust/kernel/sync/arc.rs
+++ b/rust/kernel/sync/arc.rs
@@ -263,7 +263,7 @@ pub fn into_raw(self) -> *const T {
let ptr = self.ptr.as_ptr();
core::mem::forget(self);
// SAFETY: The pointer is valid.
- unsafe { core::ptr::addr_of!((*ptr).data) }
+ unsafe { &raw const (*ptr).data }
}

/// Return a raw pointer to the data in this arc.
@@ -272,7 +272,7 @@ pub fn as_ptr(this: &Self) -> *const T {

// SAFETY: As `ptr` points to a valid allocation of type `ArcInner`,
// field projection to `data`is within bounds of the allocation.
- unsafe { core::ptr::addr_of!((*ptr).data) }
+ unsafe { &raw const (*ptr).data }
}

/// Recreates an [`Arc`] instance previously deconstructed via [`Arc::into_raw`].
--
2.48.1