linux-kernel - Re: [PATCH v4 1/2] rust: add basic Pin<Vec<T, A>> abstractions

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Message-Id: <DDH3F3QRN81U.2A00K8U33PSKA@kernel.org>
Date: Mon, 13 Oct 2025 11:39:35 +0200
From: "Benno Lossin" <lossin@...nel.org>
To: "Alice Ryhl" <aliceryhl@...gle.com>
Cc: "Markus Probst" <markus.probst@...teo.de>, "Danilo Krummrich"
 <dakr@...nel.org>, "Miguel Ojeda" <ojeda@...nel.org>, "Alex Gaynor"
 <alex.gaynor@...il.com>, "Lee Jones" <lee@...nel.org>, "Pavel Machek"
 <pavel@...nel.org>, "Lorenzo Stoakes" <lorenzo.stoakes@...cle.com>,
 "Vlastimil Babka" <vbabka@...e.cz>, "Liam R. Howlett"
 <Liam.Howlett@...cle.com>, "Uladzislau Rezki" <urezki@...il.com>, "Boqun
 Feng" <boqun.feng@...il.com>, "Gary Guo" <gary@...yguo.net>,
 <bjorn3_gh@...tonmail.com>, "Andreas Hindborg" <a.hindborg@...nel.org>,
 "Trevor Gross" <tmgross@...ch.edu>, <rust-for-linux@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, <linux-leds@...r.kernel.org>
Subject: Re: [PATCH v4 1/2] rust: add basic Pin<Vec<T, A>> abstractions

On Mon Oct 13, 2025 at 11:22 AM CEST, Alice Ryhl wrote:
> On Mon, Oct 13, 2025 at 10:03:19AM +0200, Benno Lossin wrote:
>> And `Vec::pin_init_slice` would have the following signature:
>> 
>>     fn pin_init_slice<T, I, E>(this: Vec<I>, flags: alloc::Flags) -> Result<Pin<Box<[T]>>>
>>     where
>>         I: PinInit<T, E>,
>>         Error: From<E>;
>
> We already have Box::pin_slice().

Oh that's perfect :) I still think that the helper vec function above
would be useful, if we want to use this pattern (collecting initializers
in a vec) more broadly.

---
Cheers,
Benno