linux-kernel - Re: [PATCH 2/7] rust: revocable: support fallible PinInit types

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Message-Id: <DA9QU6CVOBS6.2O87E6ZJUUBUV@kernel.org>
Date: Fri, 30 May 2025 21:31:27 +0200
From: "Benno Lossin" <lossin@...nel.org>
To: "Danilo Krummrich" <dakr@...nel.org>, <gregkh@...uxfoundation.org>,
 <rafael@...nel.org>, <ojeda@...nel.org>, <alex.gaynor@...il.com>,
 <boqun.feng@...il.com>, <gary@...yguo.net>, <bjorn3_gh@...tonmail.com>,
 <benno.lossin@...ton.me>, <a.hindborg@...nel.org>, <aliceryhl@...gle.com>,
 <tmgross@...ch.edu>, <chrisi.schrefl@...il.com>
Cc: <rust-for-linux@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/7] rust: revocable: support fallible PinInit types

On Fri May 30, 2025 at 4:24 PM CEST, Danilo Krummrich wrote:
> Currently, Revocable::new() only supports infallible PinInit
> implementations, i.e. impl PinInit<T, Infallible>.
>
> This has been sufficient so far, since users such as Devres do not
> support fallibility.
>
> Since this is about to change, make Revocable::new() generic over the
> error type E.

You could add some information about the design decisions, ie choosing
`Error` & asking for `Error: From<E>` vs just using `E`.

> Signed-off-by: Danilo Krummrich <dakr@...nel.org>

Reviewed-by: Benno Lossin <lossin@...nel.org>

---
Cheers,
Benno

> ---
>  rust/kernel/devres.rs    | 2 +-
>  rust/kernel/revocable.rs | 7 +++++--
>  2 files changed, 6 insertions(+), 3 deletions(-)