linux-kernel - Re: [PATCH v3 2/4] rust: debugfs: Bind file creation for long-lived Display

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Message-ID: <aBYItvyLspP5lzBA@polis>
Date: Sat, 3 May 2025 14:14:46 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: Matthew Maurer <mmaurer@...gle.com>
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>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Sami Tolvanen <samitolvanen@...gle.com>,
	Timur Tabi <ttabi@...dia.com>, linux-kernel@...r.kernel.org,
	rust-for-linux@...r.kernel.org
Subject: Re: [PATCH v3 2/4] rust: debugfs: Bind file creation for long-lived
 Display

On Fri, May 02, 2025 at 11:07:47AM -0700, Matthew Maurer wrote:
> I'm making this change, but so that I can be correct in the future,
> can you explain why taking an intermediate reference to private is UB?
> My understanding is that my provided vtable are supposed to be the
> only methods looking at this field, and they don't mutate it.

You're right, I confused it with something else.