linux-kernel - [PATCH v2] rust: acpi: replace manual zero-initialization with `pin

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Message-ID: <20251201155210.22710-1-atharvd440@gmail.com>
Date: Mon,  1 Dec 2025 21:22:10 +0530
From: Atharv Dubey <atharvd440@...il.com>
To: "Rafael J . Wysocki" <rafael@...nel.org>
Cc: Len Brown <lenb@...nel.org>,
	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 <lossin@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <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 v2] 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 | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/rust/kernel/acpi.rs b/rust/kernel/acpi.rs
index 37e1161c1298..cc98b36b90a0 100644
--- a/rust/kernel/acpi.rs
+++ b/rust/kernel/acpi.rs
@@ -40,8 +40,7 @@ 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