linux-kernel - Re: [PATCH] add `[pin_]init_scope` to execute code before creating an initializer

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Message-ID: <aPI_2ye1h_yeExgF@google.com>
Date: Fri, 17 Oct 2025 13:08:43 +0000
From: Alice Ryhl <aliceryhl@...gle.com>
To: Benno Lossin <lossin@...nel.org>
Cc: 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>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>, Fiona Behrens <me@...enk.dev>, 
	Christian Schrefl <chrisi.schrefl@...il.com>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] add `[pin_]init_scope` to execute code before creating an initializer

On Thu, Oct 16, 2025 at 11:05:39PM +0200, Benno Lossin wrote:
> In more complex cases, initializers need to run arbitrary code before
> assigning initializers to fields. While this is possible using the
> underscore codeblock feature (`_: {}`), values returned by such
> functions cannot be used from later field initializers.
> 
> The two new functinos `[pin_]init_scope` allow users to first run some
> fallible code and then return an initializer which the function turns
> into a single initializer. This permits using the same value multiple
> times by different fields.
> 
> Reviewed-by: Gary Guo <gary@...yguo.net>
> Reviewed-by: Danilo Krummrich <dakr@...nel.org>
> Signed-off-by: Benno Lossin <lossin@...nel.org>

Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>