linux-kernel - [PATCH v3 09/11] rust: auxiliary: replace `core::mem::zeroed` with `pin

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Message-ID: <20250814093046.2071971-10-lossin@kernel.org>
Date: Thu, 14 Aug 2025 11:30:36 +0200
From: Benno Lossin <lossin@...nel.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dave Ertman <david.m.ertman@...el.com>,
	Ira Weiny <ira.weiny@...el.com>,
	Leon Romanovsky <leon@...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>
Cc: rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 09/11] rust: auxiliary: 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.

Signed-off-by: Benno Lossin <lossin@...nel.org>
---
 rust/kernel/auxiliary.rs | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/rust/kernel/auxiliary.rs b/rust/kernel/auxiliary.rs
index 4749fb6bffef..10ec1f3b4a6d 100644
--- a/rust/kernel/auxiliary.rs
+++ b/rust/kernel/auxiliary.rs
@@ -108,11 +108,7 @@ pub const fn new(modname: &'static CStr, name: &'static CStr) -> Self {
         let name = name.as_bytes_with_nul();
         let modname = modname.as_bytes_with_nul();
 
-        // TODO: Replace with `bindings::auxiliary_device_id::default()` once stabilized for
-        // `const`.
-        //
-        // SAFETY: FFI type is valid to be zero-initialized.
-        let mut id: bindings::auxiliary_device_id = unsafe { core::mem::zeroed() };
+        let mut id: bindings::auxiliary_device_id = pin_init::zeroed();
 
         let mut i = 0;
         while i < modname.len() {
-- 
2.50.1