linux-kernel - Re: error[E0609]: no field `cpu` on type `&bindings::cpufreq

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Message-ID: <h7ujvxxzlvj5nughu3vl4ys7jqpcngdn7wpx3rn2grxuugzgvk@cekrjf5vrnbm>
Date: Thu, 4 Dec 2025 10:44:44 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Oliver Sang <oliver.sang@...el.com>
Cc: kernel test robot <lkp@...el.com>, oe-kbuild-all@...ts.linux.dev, 
	linux-kernel@...r.kernel.org
Subject: Re: error[E0609]: no field `cpu` on type `&bindings::cpufreq_policy`

On 04-12-25, 12:50, Oliver Sang wrote:
> hi, Viresh,
> 
> On Wed, Dec 03, 2025 at 12:56:10PM +0530, Viresh Kumar wrote:
> > On 03-12-25, 12:09, kernel test robot wrote:
> > > Hi Viresh,
> > > 
> > > FYI, the error/warning still remains.
> > > 
> > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > > head:   3f9f0252130e7dd60d41be0802bf58f6471c691d
> > > commit: 6ebdd7c9317737123b260a24e2780018008f1295 rust: cpufreq: Extend abstractions for policy and driver ops
> > > date:   7 months ago
> > > config: arm-randconfig-r121-20251201 (https://download.01.org/0day-ci/archive/20251203/202512031219.3OgecL5W-lkp@intel.com/config)
> > > compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project b3428bb966f1de8aa48375ffee0eba04ede133b7)
> > > rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
> > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251203/202512031219.3OgecL5W-lkp@intel.com/reproduce)
> > > 
> > > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > > the same patch/commit), kindly add following tags
> > > | Reported-by: kernel test robot <lkp@...el.com>
> > > | Closes: https://lore.kernel.org/oe-kbuild-all/202512031219.3OgecL5W-lkp@intel.com/
> > > 
> > > All errors (new ones prefixed by >>):
> > > 
> > > >> error[E0609]: no field `cpu` on type `&bindings::cpufreq_policy`
> > >    --> rust/kernel/cpufreq.rs:462:23
> > >    |
> > >    462 |         self.as_ref().cpu
> > >    |                       ^^^ unknown field
> > 
> > Is this still the case ? I wasn't able to reproduce the LKP setup, getting some
> > failures. Can you provide: rust/bindings/bindings_generated.rs from the build
> > folder ?
> 
> sorry for false positive. we confirmed this is an issue caused by a bug in
> bindgen - https://github.com/rust-lang/rust-bindgen/issues/3264
> 
> after we upgrading to bindgen-0.72.1, the issue gone.

Thanks Oliver.

-- 
viresh