linux-kernel - [PATCH] rust: acpi: replace `core::mem::zeroed` with `pin

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Message-Id: <20251020031204.78917-1-huangsiyuan@kylinos.cn>
Date: Mon, 20 Oct 2025 11:12:04 +0800
From: Siyuan Huang <huangsiyuan@...inos.cn>
To: rafael@...nel.org,
	lenb@...nel.org,
	ojeda@...nel.org,
	alex.gaynor@...il.com,
	boqun.feng@...il.com,
	gary@...yguo.net,
	bjorn3_gh@...tonmail.com,
	lossin@...nel.org,
	a.hindborg@...nel.org,
	aliceryhl@...gle.com,
	tmgross@...ch.edu,
	dakr@...nel.org
Cc: linux-acpi@...r.kernel.org,
	rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Siyuan Huang <huangsiyuan@...inos.cn>
Subject: [PATCH] rust: acpi: replace `core::mem::zeroed` with `pin_init::zeroed`

All types in `bindings` implement `Zeroable` if they can, so use
`pin_init::zeroed` instead of relying on `unsafe` code.

If this ends up not compiling in the future, something in bindgen or on
the C side changed and is most likely incorrect.

Link: https://github.com/Rust-for-Linux/linux/issues/1189
Suggested-by: Benno Lossin <lossin@...nel.org>
Signed-off-by: Siyuan Huang <huangsiyuan@...inos.cn>
---
 rust/kernel/acpi.rs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/rust/kernel/acpi.rs b/rust/kernel/acpi.rs
index 7ae317368b00..f9488be9249c 100644
--- a/rust/kernel/acpi.rs
+++ b/rust/kernel/acpi.rs
@@ -42,9 +42,7 @@ pub const fn new(id: &'static CStr) -> Self {
             "ID exceeds 16 bytes"
         );
         let src = id.as_bytes_with_nul();
-        // Replace with `bindings::acpi_device_id::default()` once stabilized for `const`.
-        // SAFETY: FFI type is valid to be zero-initialized.
-        let mut acpi: bindings::acpi_device_id = unsafe { core::mem::zeroed() };
+        let mut acpi: bindings::acpi_device_id = pin_init::zeroed();
         let mut i = 0;
         while i < src.len() {
             acpi.id[i] = src[i];
-- 
2.25.1