linux-kernel - Re: [PATCH 1/4] rust: dma: implement DataDirection

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Message-Id: <DC5Q80UUHSUV.360VLIC6DYZ78@kernel.org>
Date: Mon, 18 Aug 2025 19:23:48 +0200
From: "Danilo Krummrich" <dakr@...nel.org>
To: "Alice Ryhl" <aliceryhl@...gle.com>
Cc: <akpm@...ux-foundation.org>, <ojeda@...nel.org>,
 <alex.gaynor@...il.com>, <boqun.feng@...il.com>, <gary@...yguo.net>,
 <bjorn3_gh@...tonmail.com>, <lossin@...nel.org>, <a.hindborg@...nel.org>,
 <tmgross@...ch.edu>, <abdiel.janulgue@...il.com>, <acourbot@...dia.com>,
 <jgg@...pe.ca>, <lyude@...hat.com>, <robin.murphy@....com>,
 <daniel.almeida@...labora.com>, <rust-for-linux@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] rust: dma: implement DataDirection

On Mon Aug 18, 2025 at 4:00 PM CEST, Alice Ryhl wrote:
> In general, I think we want some sort of helper function to cast
> between arbitrary integer types in const-evaluation that panics if the
> cast is out of bounds. Both here and many other places.

What exactly do you have in mind?