linux-kernel - [PATCH] rust: acpi: replace manual zero-initialization with `pin

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Message-ID: <20251129122753.23022-1-atharvd440@gmail.com>
Date: Sat, 29 Nov 2025 17:57:53 +0530
From: Atharv Dubey <atharvd440@...il.com>
To: rafael@...nel.org,
	lenb@...nel.org
Cc: 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,
	linux-acpi@...r.kernel.org,
	rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Atharv Dubey <atharvd440@...il.com>
Subject: [PATCH] rust: acpi: replace manual zero-initialization with `pin_init::zeroed()`

Use `pin_init::zeroed()` instead of `core::mem::zeroed()` for initializing
`acpi_device_id`. This removes an explicit unsafe block and aligns ACPI
initialization with the pin-init conversion used across the Rust tree.

Link: https://github.com/Rust-for-Linux/linux/issues/1189
Signed-off-by: Atharv Dubey <atharvd440@...il.com>
---
 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 37e1161c1298..9b8efa623130 100644
--- a/rust/kernel/acpi.rs
+++ b/rust/kernel/acpi.rs
@@ -39,9 +39,7 @@ impl DeviceId {
     pub const fn new(id: &'static CStr) -> Self {
         let src = id.to_bytes_with_nul();
         build_assert!(src.len() <= Self::ACPI_ID_LEN, "ID exceeds 16 bytes");
-        // 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];
-- 
2.43.0