From: Antonio Hickey Date: Thu, 19 Mar 2026 09:35:28 +0000 (+0100) Subject: rust: pin-init: replace `addr_of_mut!` with `&raw mut` X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=09808839c7aa6695ceff5cd822c18b0d9550184d;p=thirdparty%2Fkernel%2Fstable.git rust: pin-init: replace `addr_of_mut!` with `&raw mut` `feature(raw_ref_op)` became stable in Rust 1.82.0 which is the current MSRV of pin-init with no default features. Earlier Rust versions will now need to enable `raw_ref_op` to continue to work with pin-init. This reduces visual complexity and improves consistency with existing reference syntax. Suggested-by: Benno Lossin Link: https://github.com/Rust-for-Linux/linux/issues/1148 Closes: https://github.com/Rust-for-Linux/pin-init/issues/99 Signed-off-by: Antonio Hickey Link: https://github.com/Rust-for-Linux/pin-init/commit/e27763004e2f6616b089437fbe9b3719cd72bd5c [ Reworded commit message. - Benno ] Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260319093542.3756606-6-lossin@kernel.org Signed-off-by: Benno Lossin --- diff --git a/rust/pin-init/README.md b/rust/pin-init/README.md index 6cee6ab1eb57..9095d6661ff6 100644 --- a/rust/pin-init/README.md +++ b/rust/pin-init/README.md @@ -160,7 +160,6 @@ actually does the initialization in the correct way. Here are the things to look ```rust use pin_init::{pin_data, pinned_drop, PinInit, PinnedDrop, pin_init_from_closure}; use core::{ - ptr::addr_of_mut, marker::PhantomPinned, cell::UnsafeCell, pin::Pin, @@ -199,7 +198,7 @@ impl RawFoo { unsafe { pin_init_from_closure(move |slot: *mut Self| { // `slot` contains uninit memory, avoid creating a reference. - let foo = addr_of_mut!((*slot).foo); + let foo = &raw mut (*slot).foo; let foo = UnsafeCell::raw_get(foo).cast::(); // Initialize the `foo` diff --git a/rust/pin-init/examples/big_struct_in_place.rs b/rust/pin-init/examples/big_struct_in_place.rs index de8612a5e27d..80f89b5f8fd6 100644 --- a/rust/pin-init/examples/big_struct_in_place.rs +++ b/rust/pin-init/examples/big_struct_in_place.rs @@ -1,6 +1,7 @@ // SPDX-License-Identifier: Apache-2.0 OR MIT #![cfg_attr(USE_RUSTC_FEATURES, feature(lint_reasons))] +#![cfg_attr(USE_RUSTC_FEATURES, feature(raw_ref_op))] use pin_init::*; diff --git a/rust/pin-init/examples/linked_list.rs b/rust/pin-init/examples/linked_list.rs index 226e33e4a957..119169e4dc41 100644 --- a/rust/pin-init/examples/linked_list.rs +++ b/rust/pin-init/examples/linked_list.rs @@ -3,6 +3,7 @@ #![allow(clippy::undocumented_unsafe_blocks)] #![cfg_attr(feature = "alloc", feature(allocator_api))] #![cfg_attr(USE_RUSTC_FEATURES, feature(lint_reasons))] +#![cfg_attr(USE_RUSTC_FEATURES, feature(raw_ref_op))] use core::{ cell::Cell, diff --git a/rust/pin-init/examples/mutex.rs b/rust/pin-init/examples/mutex.rs index e534c367f644..d53671f0edb8 100644 --- a/rust/pin-init/examples/mutex.rs +++ b/rust/pin-init/examples/mutex.rs @@ -3,6 +3,7 @@ #![allow(clippy::undocumented_unsafe_blocks)] #![cfg_attr(feature = "alloc", feature(allocator_api))] #![cfg_attr(USE_RUSTC_FEATURES, feature(lint_reasons))] +#![cfg_attr(USE_RUSTC_FEATURES, feature(raw_ref_op))] #![allow(clippy::missing_safety_doc)] use core::{ diff --git a/rust/pin-init/examples/pthread_mutex.rs b/rust/pin-init/examples/pthread_mutex.rs index 562ca5d3d08c..f3b5cc9b7134 100644 --- a/rust/pin-init/examples/pthread_mutex.rs +++ b/rust/pin-init/examples/pthread_mutex.rs @@ -4,6 +4,7 @@ #![allow(clippy::undocumented_unsafe_blocks)] #![cfg_attr(feature = "alloc", feature(allocator_api))] #![cfg_attr(USE_RUSTC_FEATURES, feature(lint_reasons))] +#![cfg_attr(USE_RUSTC_FEATURES, feature(raw_ref_op))] #[cfg(not(windows))] mod pthread_mtx { diff --git a/rust/pin-init/examples/static_init.rs b/rust/pin-init/examples/static_init.rs index df562134a53c..f7e53d1a5ae6 100644 --- a/rust/pin-init/examples/static_init.rs +++ b/rust/pin-init/examples/static_init.rs @@ -3,6 +3,7 @@ #![allow(clippy::undocumented_unsafe_blocks)] #![cfg_attr(feature = "alloc", feature(allocator_api))] #![cfg_attr(USE_RUSTC_FEATURES, feature(lint_reasons))] +#![cfg_attr(USE_RUSTC_FEATURES, feature(raw_ref_op))] #![allow(unused_imports)] use core::{ diff --git a/rust/pin-init/internal/src/init.rs b/rust/pin-init/internal/src/init.rs index c1c9400b090a..daa3f1c6466e 100644 --- a/rust/pin-init/internal/src/init.rs +++ b/rust/pin-init/internal/src/init.rs @@ -270,7 +270,7 @@ fn init_fields( { #value_prep // SAFETY: TODO - unsafe { #write(::core::ptr::addr_of_mut!((*#slot).#ident), #value_ident) }; + unsafe { #write(&raw mut (*#slot).#ident, #value_ident) }; } #(#cfgs)* #[allow(unused_variables)] @@ -293,7 +293,7 @@ fn init_fields( // return when an error/panic occurs. // - We also use `#data` to require the correct trait (`Init` or `PinInit`) // for `#ident`. - unsafe { #data.#ident(::core::ptr::addr_of_mut!((*#slot).#ident), #init)? }; + unsafe { #data.#ident(&raw mut (*#slot).#ident, #init)? }; }, quote! { // SAFETY: TODO @@ -308,7 +308,7 @@ fn init_fields( unsafe { ::pin_init::Init::__init( #init, - ::core::ptr::addr_of_mut!((*#slot).#ident), + &raw mut (*#slot).#ident, )? }; }, @@ -348,7 +348,7 @@ fn init_fields( // SAFETY: We forget the guard later when initialization has succeeded. let #guard = unsafe { ::pin_init::__internal::DropGuard::new( - ::core::ptr::addr_of_mut!((*slot).#ident) + &raw mut (*slot).#ident ) }; }); diff --git a/rust/pin-init/src/lib.rs b/rust/pin-init/src/lib.rs index d09e7fe97eae..64eec095c859 100644 --- a/rust/pin-init/src/lib.rs +++ b/rust/pin-init/src/lib.rs @@ -172,7 +172,6 @@ //! # #![feature(extern_types)] //! use pin_init::{pin_data, pinned_drop, PinInit, PinnedDrop, pin_init_from_closure}; //! use core::{ -//! ptr::addr_of_mut, //! marker::PhantomPinned, //! cell::UnsafeCell, //! pin::Pin, @@ -211,7 +210,7 @@ //! unsafe { //! pin_init_from_closure(move |slot: *mut Self| { //! // `slot` contains uninit memory, avoid creating a reference. -//! let foo = addr_of_mut!((*slot).foo); +//! let foo = &raw mut (*slot).foo; //! let foo = UnsafeCell::raw_get(foo).cast::(); //! //! // Initialize the `foo` @@ -265,6 +264,7 @@ //! [Rust-for-Linux]: https://rust-for-linux.com/ #![cfg_attr(USE_RUSTC_FEATURES, feature(lint_reasons))] +#![cfg_attr(USE_RUSTC_FEATURES, feature(raw_ref_op))] #![cfg_attr( all(any(feature = "alloc", feature = "std"), USE_RUSTC_FEATURES), feature(new_uninit) @@ -754,7 +754,7 @@ macro_rules! stack_try_pin_init { /// /// ```rust /// # use pin_init::*; -/// # use core::{ptr::addr_of_mut, marker::PhantomPinned}; +/// # use core::marker::PhantomPinned; /// #[pin_data] /// #[derive(Zeroable)] /// struct Buf { @@ -768,7 +768,7 @@ macro_rules! stack_try_pin_init { /// let init = pin_init!(&this in Buf { /// buf: [0; 64], /// // SAFETY: TODO. -/// ptr: unsafe { addr_of_mut!((*this.as_ptr()).buf).cast() }, +/// ptr: unsafe { (&raw mut (*this.as_ptr()).buf).cast() }, /// pin: PhantomPinned, /// }); /// let init = pin_init!(Buf {