[PATCH v2] rust: of: replace `core::mem::zeroed` with `pin_init::zeroed`

[PATCH v2] rust: of: replace `core::mem::zeroed` with `pin_init::zeroed`

[Moritz Zielke via B4 Relay]

From: Moritz Zielke <moritz.zielke@gmail.com>

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@kernel.org>
Signed-off-by: Moritz Zielke <moritz.zielke@gmail.com>
---
Changes in v2:
- Rearrange tags and `---` so tags don't get lost when patch is applied
- Link to v1: https://lore.kernel.org/r/20251030-zeroed-of-rs-v1-1-1c46d025128e@gmail.com
---
 rust/kernel/of.rs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/rust/kernel/of.rs b/rust/kernel/of.rs
index 58b20c367..cfcfbb1fd 100644
--- a/rust/kernel/of.rs
+++ b/rust/kernel/of.rs
@@ -35,9 +35,7 @@ impl DeviceId {
     /// Create a new device id from an OF 'compatible' string.
     pub const fn new(compatible: &'static CStr) -> Self {
         let src = compatible.to_bytes_with_nul();
-        // Replace with `bindings::of_device_id::default()` once stabilized for `const`.
-        // SAFETY: FFI type is valid to be zero-initialized.
-        let mut of: bindings::of_device_id = unsafe { core::mem::zeroed() };
+        let mut of: bindings::of_device_id = pin_init::zeroed();
 
         // TODO: Use `copy_from_slice` once stabilized for `const`.
         let mut i = 0;

---
base-commit: 3b1728b74a52e8489f0c7bfd3d682572dd9901de
change-id: 20251030-zeroed-of-rs-a6eb25113c37

Best regards,
-- 
Moritz Zielke <moritz.zielke@gmail.com>

Re: [PATCH v2] rust: of: replace `core::mem::zeroed` with `pin_init::zeroed`

[Danilo Krummrich]

On 10/31/25 10:51 AM, Moritz Zielke via B4 Relay wrote:
> From: Moritz Zielke <moritz.zielke@gmail.com>
> 
> 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@kernel.org>
> Signed-off-by: Moritz Zielke <moritz.zielke@gmail.com>

Reviewed-by: Danilo Krummrich <dakr@kernel.org>