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

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Message-ID: <875xl6e2wr.fsf@kernel.org>
Date: Wed, 19 Feb 2025 09:48:04 +0100
From: Andreas Hindborg <a.hindborg@...nel.org>
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>,  "Alice Ryhl" <aliceryhl@...gle.com>,
  "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

"Asahi Lina" <lina@...hilina.net> writes:

> 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: Andreas Hindborg <a.hindborg@...nel.org>


Best regards,
Andreas Hindborg