linux-kernel - Re: [PATCH 1/3] rust: sync: implement `Default` for `LockClassKey`

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Date: Tue, 2 Apr 2024 11:46:38 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Miguel Ojeda <ojeda@...nel.org>
Cc: Wedson Almeida Filho <wedsonaf@...il.com>, 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 <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, 
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
	patches@...ts.linux.dev
Subject: Re: [PATCH 1/3] rust: sync: implement `Default` for `LockClassKey`

On Mon, Apr 1, 2024 at 11:23 PM Miguel Ojeda <ojeda@...nel.org> wrote:
>
> In the upcoming Rust 1.78.0, Clippy suggests to implement `Default` even
> when `new()` is `const`, since `Default::default()` may call `const`
> functions even if it is not `const` itself [1]:
>
>     error: you should consider adding a `Default` implementation for `LockClassKey`
>       --> rust/kernel/sync.rs:31:5
>        |
>     31 | /     pub const fn new() -> Self {
>     32 | |         Self(Opaque::uninit())
>     33 | |     }
>        | |_____^
>
> Thus implement it.
>
> Link: https://github.com/rust-lang/rust-clippy/pull/10903 [1]
> Signed-off-by: Miguel Ojeda <ojeda@...nel.org>

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