linux-kernel - [PATCH v3 08/11] rust: drm: replace `core::mem::zeroed` with `pin

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Message-ID: <20250814093046.2071971-9-lossin@kernel.org>
Date: Thu, 14 Aug 2025 11:30:35 +0200
From: Benno Lossin <lossin@...nel.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	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>,
	Lyude Paul <lyude@...hat.com>,
	Daniel Almeida <daniel.almeida@...labora.com>,
	Asahi Lina <lina+kernel@...hilina.net>
Cc: dri-devel@...ts.freedesktop.org,
	rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 08/11] rust: drm: 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/drm/gem/mod.rs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs
index b71821cfb5ea..6532513090de 100644
--- a/rust/kernel/drm/gem/mod.rs
+++ b/rust/kernel/drm/gem/mod.rs
@@ -308,9 +308,7 @@ impl<T: DriverObject> AllocImpl for Object<T> {
 }
 
 pub(super) const fn create_fops() -> bindings::file_operations {
-    // SAFETY: As by the type invariant, it is safe to initialize `bindings::file_operations`
-    // zeroed.
-    let mut fops: bindings::file_operations = unsafe { core::mem::zeroed() };
+    let mut fops: bindings::file_operations = pin_init::zeroed();
 
     fops.owner = core::ptr::null_mut();
     fops.open = Some(bindings::drm_open);
-- 
2.50.1