linux-kernel - Re: [PATCH 3/6] rust: page: Make with_page_mapped() and with_pointer_into

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Message-ID: <CAH5fLggrgd5fX1vDGKjfqiZ+cjYK6p+q8XaCfCa_KwsTT4L+Qg@mail.gmail.com>
Date: Mon, 3 Feb 2025 10:10:23 +0100
From: Alice Ryhl <aliceryhl@...gle.com>
To: Asahi Lina <lina@...hilina.net>
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>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Trevor Gross <tmgross@...ch.edu>, Jann Horn <jannh@...gle.com>, 
	Matthew Wilcox <willy@...radead.org>, Paolo Bonzini <pbonzini@...hat.com>, 
	Danilo Krummrich <dakr@...nel.org>, Wedson Almeida Filho <wedsonaf@...il.com>, 
	Valentin Obst <kernel@...entinobst.de>, Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, 
	airlied@...hat.com, Abdiel Janulgue <abdiel.janulgue@...il.com>, 
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
	asahi@...ts.linux.dev
Subject: Re: [PATCH 3/6] rust: page: Make with_page_mapped() and
 with_pointer_into_page() public

On Sun, Feb 2, 2025 at 2:06 PM Asahi Lina <lina@...hilina.net> wrote:
>
> Lets users do (unsafe) complex page read/write operations without having
> to repeatedly call into read_raw()/write_raw() (which may be expensive
> in some cases).
>
> The functions themselves are not unsafe, but they do take a closure that
> receives a raw pointer, so actually making the access requires unsafe
> code.
>
> Signed-off-by: Asahi Lina <lina@...hilina.net>

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