linux-kernel - Re: [PATCH v8 2/8] rust: task: add `Task::current

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Message-ID: <20240807154140.6ea8cb89@eugeo>
Date: Wed, 7 Aug 2024 15:41:40 +0100
From: Gary Guo <gary@...yguo.net>
To: Alice Ryhl <aliceryhl@...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>, "Björn Roy Baron"
 <bjorn3_gh@...tonmail.com>, Benno Lossin <benno.lossin@...ton.me>, Andreas
 Hindborg <a.hindborg@...sung.com>, Peter Zijlstra <peterz@...radead.org>,
 Alexander Viro <viro@...iv.linux.org.uk>, Christian Brauner
 <brauner@...nel.org>, 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>, Dan Williams <dan.j.williams@...el.com>,
 Matthew Wilcox <willy@...radead.org>, Thomas Gleixner <tglx@...utronix.de>,
 Daniel Xu <dxu@...uu.xyz>, Martin Rodriguez Reboredo <yakoyoku@...il.com>,
 Trevor Gross <tmgross@...ch.edu>, linux-kernel@...r.kernel.org,
 rust-for-linux@...r.kernel.org, linux-fsdevel@...r.kernel.org, Kees Cook
 <kees@...nel.org>
Subject: Re: [PATCH v8 2/8] rust: task: add `Task::current_raw`

On Thu, 25 Jul 2024 14:27:35 +0000
Alice Ryhl <aliceryhl@...gle.com> wrote:

> Introduces a safe function for getting a raw pointer to the current
> task.
> 
> When writing bindings that need to access the current task, it is often
> more convenient to call a method that directly returns a raw pointer
> than to use the existing `Task::current` method. However, the only way
> to do that is `bindings::get_current()` which is unsafe since it calls
> into C. By introducing `Task::current_raw()`, it becomes possible to
> obtain a pointer to the current task without using unsafe.
> 
> Link: https://lore.kernel.org/all/CAH5fLgjT48X-zYtidv31mox3C4_Ogoo_2cBOCmX0Ang3tAgGHA@mail.gmail.com/
> Reviewed-by: Benno Lossin <benno.lossin@...ton.me>
> Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@...il.com>
> Reviewed-by: Trevor Gross <tmgross@...ch.edu>
> Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>

Reviewed-by: Gary Guo <gary@...yguo.net>

> ---
>  rust/kernel/task.rs | 15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)