linux-kernel - Re: [PATCH v3 1/6] gpu: nova-core: replace `as` with `from` conversions where possible

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Message-Id: <DDUCIDB7E861.3FJ7OM506MTJ6@nvidia.com>
Date: Wed, 29 Oct 2025 08:31:41 +0900
From: "Alexandre Courbot" <acourbot@...dia.com>
To: "Alexandre Courbot" <acourbot@...dia.com>, "Alice Ryhl"
 <aliceryhl@...gle.com>, "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>, "Trevor Gross" <tmgross@...ch.edu>
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>, "Danilo
 Krummrich" <dakr@...nel.org>, "Nouveau"
 <nouveau-bounces@...ts.freedesktop.org>
Subject: Re: [PATCH v3 1/6] gpu: nova-core: replace `as` with `from`
 conversions where possible

On Wed Oct 29, 2025 at 8:12 AM JST, Alexandre Courbot wrote:
> The `as` operator is best avoided as it silently drops bits if the
> destination type is smaller that the source.
>
> For data types where this is clearly not the case, use `from` to
> unambiguously signal that these conversions are lossless.
>
> Acked-by: Danilo Krummrich <dakr@...nel.org>
> Signed-off-by: Alexandre Courbot <acourbot@...dia.com>

Unless someeone screams, I will probably merge this one patch today - it
doesn't do anything controversial and is required for another series.
Reviews welcome still.