linux-kernel - Re: [PATCH v11 0/6] rust: reduce `as` casts, enable related lints

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Message-ID: <CANiq72m1ZWxPgCda1C-8X5XOvEq9Z9JfJZqhU4ZUzZ64=N+2fQ@mail.gmail.com>
Date: Fri, 13 Jun 2025 20:14:41 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Tamir Duberstein <tamird@...il.com>
Cc: Masahiro Yamada <masahiroy@...nel.org>, Nathan Chancellor <nathan@...nel.org>, 
	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>, Abdiel Janulgue <abdiel.janulgue@...il.com>, 
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	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
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	FUJITA Tomonori <fujita.tomonori@...il.com>, Nicolas Schier <nicolas.schier@...ux.dev>, 
	Frederic Weisbecker <frederic@...nel.org>, Lyude Paul <lyude@...hat.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Anna-Maria Behnsen <anna-maria@...utronix.de>, 
	Benno Lossin <lossin@...nel.org>, Krzysztof Wilczyński <kwilczynski@...nel.org>, 
	John Stultz <jstultz@...gle.com>, Stephen Boyd <sboyd@...nel.org>, 
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, "Liam R. Howlett" <Liam.Howlett@...cle.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, 
	dri-devel@...ts.freedesktop.org, netdev@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v11 0/6] rust: reduce `as` casts, enable related lints

On Wed, Jun 11, 2025 at 12:23 PM Tamir Duberstein <tamird@...il.com> wrote:
>
> This series depends on "rust: retain pointer mut-ness in
> `container_of!`"[1].

Not anymore! :)

> Signed-off-by: Tamir Duberstein <tamird@...il.com>

Thanks for rebasing, Tamir, I appreciate it.

This has a bunch of hits in configfs, cpufreq and Nova [1]. I guess
you built without those enabled.

Could you please fix those? Since this affects other maintainers that
we need to ask the Acked-by to, let's try to at least give them the
final state.

Thanks!

Cheers,
Miguel

[1]

warning: reference as raw pointer
   --> rust/kernel/configfs.rs:429:9

warning: reference as raw pointer
   --> rust/kernel/configfs.rs:467:9

warning: reference as raw pointer
   --> rust/kernel/configfs.rs:479:9

warning: `as` casting between raw pointers without changing their constness
   --> rust/kernel/configfs.rs:564:48

warning: reference as raw pointer
   --> rust/kernel/configfs.rs:721:39

warning: reference as raw pointer
   --> rust/kernel/configfs.rs:764:35

warning: reference as raw pointer
   --> rust/kernel/configfs.rs:783:35

warning: reference as raw pointer
   --> rust/kernel/configfs.rs:764:35

warning: reference as raw pointer
   --> rust/kernel/configfs.rs:783:35

warning: using `as _` conversion
   --> rust/kernel/cpufreq.rs:650:45

warning: `as` casting between raw pointers without changing their constness
   --> rust/kernel/cpufreq.rs:650:45

warning: using `as _` conversion
  --> drivers/gpu/nova-core/driver.rs:22:64

warning: casts from `u8` to `u32` can be expressed infallibly using `From`
   --> drivers/gpu/nova-core/regs/macros.rs:267:26

warning: casts from `u8` to `u32` can be expressed infallibly using `From`
   --> drivers/gpu/nova-core/regs/macros.rs:267:26

warning: casts from `u8` to `u32` can be expressed infallibly using `From`
   --> drivers/gpu/nova-core/regs/macros.rs:267:26

warning: casts from `u8` to `u32` can be expressed infallibly using `From`
   --> drivers/gpu/nova-core/regs/macros.rs:267:26

warning: casts from `u8` to `u32` can be expressed infallibly using `From`
   --> drivers/gpu/nova-core/regs/macros.rs:267:26

warning: casts from `u8` to `u32` can be expressed infallibly using `From`
  --> drivers/gpu/nova-core/regs.rs:35:65