linux-kernel - Re: [PATCH v5] rust: add global lock support

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Message-ID: <CAH5fLgjMo6_BJFqYfqHav6UqEwiQVm5+BPGYCZFQwEWDb4sdOg@mail.gmail.com>
Date: Wed, 23 Oct 2024 15:19:30 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Miguel Ojeda <ojeda@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>, Waiman Long <longman@...hat.com>, 
	Boqun Feng <boqun.feng@...il.com>
Cc: Gary Guo <gary@...yguo.net>, Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Andreas Hindborg <a.hindborg@...nel.org>
Subject: Re: [PATCH v5] rust: add global lock support

On Wed, Oct 23, 2024 at 3:17 PM Alice Ryhl <aliceryhl@...gle.com> wrote:
>
> Add support for creating global variables that are wrapped in a mutex or
> spinlock.
>
> The implementation here is intended to replace the global mutex
> workaround found in the Rust Binder RFC [1]. In both cases, the global
> lock must be initialized before first use. The macro is unsafe to use
> for the same reason.
>
> The separate initialization step is required because it is tricky to
> access the value of __ARCH_SPIN_LOCK_UNLOCKED from Rust. Doing so will
> require changes to the C side. That change will happen as a follow-up to
> this patch.
>
> Link: https://lore.kernel.org/rust-for-linux/20231101-rust-binder-v1-2-08ba9197f637@google.com/#Z31drivers:android:context.rs [1]
> Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>

Something has gone terribly wrong with the versioning. This should be
v6. Resending ...

Sorry!

Alice