linux-kernel - Re: [PATCH] rust: auxiliary: use `pin

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Message-Id: <DEMKCLMSAUUX.1Y5ZKG3T3PC1K@nvidia.com>
Date: Mon, 01 Dec 2025 12:34:56 +0900
From: "Alexandre Courbot" <acourbot@...dia.com>
To: "Atharv Dubey" <atharvd440@...il.com>, <gregkh@...uxfoundation.org>,
 <ojeda@...nel.org>, <alex.gaynor@...il.com>
Cc: <david.m.ertman@...el.com>, <ira.weiny@...el.com>, <leon@...nel.org>,
 <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>, <rust-for-linux@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] rust: auxiliary: use `pin_init::zeroed()` for  device
 ID

On Sat Nov 29, 2025 at 9:47 PM JST, Atharv Dubey wrote:
> Replace the previous `unsafe { core::mem::zeroed() }` initialization
> for `bindings::auxillary_device_id` with `pin_init::zeroed()`. This removes
> the explicit unsafe block and uses the safer pinned zero-initialization
> helper.
>
> Signed-off-by: Atharv Dubey <atharvd440@...il.com>
> ---
>  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 7a3b0b9c418e..67c5d356d754 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.to_bytes_with_nul();
>          let modname = modname.to_bytes_with_nul();
>  
> -        // TODO: Replace with `bindings::auxiliary_device_id::default()` once stabilized for
> -        // `const`.

I'd still keep this `TODO`, a `Default` implementation is more adequate
that `Zeroable` here even if they end up doing the same.

Nitpicky: there are two spaces in `for  device` in the patch subject.