linux-kernel - Re: [PATCH v5] rust: rbtree: add immutable cursor

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Message-ID: <CANiq72m67LnE4P8D+yfN3fUfK-NnYDqk9gTvLok=mMSi+bO=1g@mail.gmail.com>
Date: Sun, 16 Nov 2025 23:34:31 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Vitaly Wool <vitaly.wool@...sulko.se>
Cc: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Danilo Krummrich <dakr@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
	Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
	Gary Guo <gary@...yguo.net>, Bjorn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Trevor Gross <tmgross@...ch.edu>, Onur Özkan <work@...rozkan.dev>
Subject: Re: [PATCH v5] rust: rbtree: add immutable cursor

On Tue, Oct 14, 2025 at 2:33 PM Vitaly Wool <vitaly.wool@...sulko.se> wrote:
>
> Sometimes we may need to iterate over, or find an element in a read
> only (or read mostly) red-black tree, and in that case we don't need a
> mutable reference to the tree, which we'll however have to take to be
> able to use the current (mutable) cursor implementation.
>
> This patch adds a simple immutable cursor implementation to RBTree,
> which enables us to use an immutable tree reference. The existing
> (fully featured) cursor implementation is renamed to CursorMut,
> while retaining its functionality.
>
> The only existing user of the [mutable] cursor for RBTrees (binder) is
> updated to match the changes.
>
> Signed-off-by: Vitaly Wool <vitaly.wool@...sulko.se>

Applied to `rust-next` -- thanks everyone!

    [ Applied `rustfmt`. Added intra-doc link. Fixed unclosed example.
      Fixed docs description. Fixed typo and other formatting nits.
        - Miguel ]

Cheers,
Miguel