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Date: Wed, 22 Oct 2025 11:07:53 +0200
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Subject: Re: [PATCH] rust: debugfs: Implement Reader for Mutex<T> only when T
 is Unpin
To: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
 Daniel Almeida <daniel.almeida@collabora.com>,
 Matthew Maurer <mmaurer@google.com>, Stephen Rothwell
 <sfr@canb.auug.org.au>, Thomas Gleixner <tglx@linutronix.de>,
 Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
 linux-kernel@vger.kernel.org, linux-next@vger.kernel.org,
 Miguel Ojeda <ojeda@kernel.org>, Alex Gaynor <alex.gaynor@gmail.com>,
 Gary Guo <gary@garyguo.net>, lossin@kernel.org,
 Andreas Hindborg <a.hindborg@kernel.org>, Alice Ryhl <aliceryhl@google.com>,
 Trevor Gross <tmgross@umich.edu>, rust-for-linux@vger.kernel.org
References: <aPhGo5WjbPM1Yu95@tardis-2.local>
 <20251022034237.70431-1-boqun.feng@gmail.com>
From: Danilo Krummrich <dakr@kernel.org>
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On 10/22/25 5:42 AM, Boqun Feng wrote:
> Since we are going to make `Mutex<T>` structurally pin the data (i.e.
> `T`), therefore `.lock()` function only returns a `Guard` that can
> dereference a mutable reference to `T` if only `T` is `Unpin`, therefore
> restrict the impl `Reader` block of `Mutex<T>` to that.
> 
> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>

I assume this can go through the driver-core tree, since it's only about a
conflict in linux-next?