linux-kernel - Re: [PATCH 6/9] gpu: nova-core: gsp: derive Zeroable for GspStaticConfigInfo

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Message-ID: <a8276c36fe1638cc584262d0d722623987deb1ae.camel@redhat.com>
Date: Thu, 11 Dec 2025 17:07:15 -0500
From: lyude@...hat.com
To: Alexandre Courbot <acourbot@...dia.com>, Danilo Krummrich
 <dakr@...nel.org>,  Alice Ryhl <aliceryhl@...gle.com>, David Airlie
 <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: John Hubbard <jhubbard@...dia.com>, Alistair Popple
 <apopple@...dia.com>,  Joel Fernandes <joelagnelf@...dia.com>, Timur Tabi
 <ttabi@...dia.com>, Edwin Peer <epeer@...dia.com>, 
	nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org
Subject: Re: [PATCH 6/9] gpu: nova-core: gsp: derive Zeroable for
 GspStaticConfigInfo

Reviewed-by: Lyude Paul <lyude@...hat.com>

On Mon, 2025-12-08 at 18:26 +0900, Alexandre Courbot wrote:
> We can derive `Zeroable` automatically instead of implementing it
> ourselves if we convert it from a tuple struct into a regular one.
> This
> removes an `unsafe` statement.
> 
> Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
> ---
>  drivers/gpu/nova-core/gsp/fw/commands.rs | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/nova-core/gsp/fw/commands.rs
> b/drivers/gpu/nova-core/gsp/fw/commands.rs
> index 21be44199693..85465521de32 100644
> --- a/drivers/gpu/nova-core/gsp/fw/commands.rs
> +++ b/drivers/gpu/nova-core/gsp/fw/commands.rs
> @@ -107,12 +107,15 @@ unsafe impl FromBytes for PackedRegistryTable
> {}
>  
>  /// Payload of the `GetGspStaticInfo` command and message.
>  #[repr(transparent)]
> -pub(crate) struct
> GspStaticConfigInfo(bindings::GspStaticConfigInfo_t);
> +#[derive(Zeroable)]
> +pub(crate) struct GspStaticConfigInfo {
> +    inner: bindings::GspStaticConfigInfo_t,
> +}
>  
>  impl GspStaticConfigInfo {
>      /// Returns a bytes array containing the (hopefully) zero-
> terminated name of this GPU.
>      pub(crate) fn gpu_name_str(&self) -> [u8; 64] {
> -        self.0.gpuNameString
> +        self.inner.gpuNameString
>      }
>  }
>  
> @@ -122,7 +125,3 @@ unsafe impl AsBytes for GspStaticConfigInfo {}
>  // SAFETY: This struct only contains integer types for which all bit
> patterns
>  // are valid.
>  unsafe impl FromBytes for GspStaticConfigInfo {}
> -
> -// SAFETY: This struct only contains integer types and fixed-size
> arrays for which
> -// all bit patterns are valid.
> -unsafe impl Zeroable for GspStaticConfigInfo {}