linux-kernel - Re: [PATCH v4 6/6] rust: use strict provenance APIs

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Message-ID: <D8IMQ8OEOMAG.1AFKGZJ1C4DGQ@proton.me>
Date: Mon, 17 Mar 2025 15:00:26 +0000
From: Benno Lossin <benno.lossin@...ton.me>
To: Tamir Duberstein <tamird@...il.com>
Cc: Masahiro Yamada <masahiroy@...nel.org>, Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 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>, Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>, Brendan Higgins <brendan.higgins@...ux.dev>, David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>, Bjorn Helgaas <bhelgaas@...gle.com>, Luis Chamberlain <mcgrof@...nel.org>, Russ Weight <russ.weight@...ux.dev>, Rob Herring <robh@...nel.org>, Saravana Kannan <saravanak@...gle.com>, linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
	linux-pci@...r.kernel.org, linux-block@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v4 6/6] rust: use strict provenance APIs

On Mon Mar 17, 2025 at 3:13 PM CET, Tamir Duberstein wrote:
> On Mon, Mar 17, 2025 at 6:53 AM Tamir Duberstein <tamird@...il.com> wrote:
>>
>> On Mon, Mar 17, 2025 at 5:34 AM Benno Lossin <benno.lossin@...ton.me> wrote:
>> >
>> > > +    pub fn expose_provenance<T>(addr: *const T) -> usize {
>> > > +        addr.expose_provenance()
>> >
>> > Instead of having these stubs here, you can probably just do
>> >
>> >     pub use core::ptr::expose_provenance;
>>
>> This doesn't work for the methods on primitives, but it works for the
>> free functions. Done.
>
> Have to revert this, writing `pub use ...` directly causes the MSRV
> clippy lint to fire at the caller.

Ah that is unfortunate.

---
Cheers,
Benno