linux-kernel - Re: [PATCH 4/6] rust: rbtree: add `RBTreeIteratorMut`

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Date: Fri, 9 Feb 2024 14:06:29 +0100
From: Alice Ryhl <aliceryhl@...gle.com>
To: mattgilbride@...gle.com
Cc: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Wedson Almeida Filho <wedsonaf@...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>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Arve Hjønnevåg <arve@...roid.com>, 
	Todd Kjos <tkjos@...roid.com>, Martijn Coenen <maco@...roid.com>, 
	Joel Fernandes <joel@...lfernandes.org>, Carlos Llamas <cmllamas@...gle.com>, 
	Suren Baghdasaryan <surenb@...gle.com>, Christian Brauner <brauner@...nel.org>, Rob Landley <rob@...dley.net>, 
	Davidlohr Bueso <dave@...olabs.net>, Michel Lespinasse <michel@...pinasse.org>, 
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Matt Gilbride <mattgilbride@...il.com>
Subject: Re: [PATCH 4/6] rust: rbtree: add `RBTreeIteratorMut`

On Mon, Feb 5, 2024 at 4:50 PM <mattgilbride@...gle.com> wrote:
>
> From: Wedson Almeida Filho <wedsonaf@...il.com>
>
> Add mutable Iterator implementation (`RBTreeIteratorMut`) for `RBTree`,
> allowing iteration over (key, value) pairs in key order. Only values are
> mutable, as mutating keys implies modifying a node's position in the tree.
>
> Mutable iteration is used by the binder driver during shutdown to
> clean up the tree maintained by the "range allocator" [1].
>
> Link: https://lore.kernel.org/rust-for-linux/20231101-rust-binder-v1-6-08ba9197f637@google.com/ [1]
> Signed-off-by: Wedson Almeida Filho <wedsonaf@...il.com>
> Signed-off-by: Matt Gilbride <mattgilbride@...il.com>

I have looked at these bindings many times over the past year. They
look good to me.

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

These abstractions have been very heavily exercised by the Rust Binder
driver.

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