linux-kernel - Re: [PATCH v6 1/2] rust: regulator: add a bare minimum regulator abstraction

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Message-ID: <202506292009.nbvCCbAr-lkp@intel.com>
Date: Sun, 29 Jun 2025 21:10:47 +0800
From: kernel test robot <lkp@...el.com>
To: Daniel Almeida <daniel.almeida@...labora.com>,
	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>,
	Danilo Krummrich <dakr@...nel.org>,
	Boris Brezillon <bbrezillon@...nel.org>,
	Sebastian Reichel <sebastian.reichel@...labora.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
	Daniel Almeida <daniel.almeida@...labora.com>
Subject: Re: [PATCH v6 1/2] rust: regulator: add a bare minimum regulator
 abstraction

Hi Daniel,

kernel test robot noticed the following build warnings:

[auto build test WARNING on edc5e6e019c99b529b3d1f2801d5cce9924ae79b]

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-Almeida/rust-regulator-add-a-bare-minimum-regulator-abstraction/20250628-011418
base:   edc5e6e019c99b529b3d1f2801d5cce9924ae79b
patch link:    https://lore.kernel.org/r/20250627-topics-tyr-regulator-v6-1-1d015219b454%40collabora.com
patch subject: [PATCH v6 1/2] rust: regulator: add a bare minimum regulator abstraction
config: x86_64-randconfig-008-20250629 (https://download.01.org/0day-ci/archive/20250629/202506292009.nbvCCbAr-lkp@intel.com/config)
compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082)
rustc: rustc 1.78.0 (9b00956e5 2024-04-29)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250629/202506292009.nbvCCbAr-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/202506292009.nbvCCbAr-lkp@intel.com/

All warnings (new ones prefixed by >>):

   ***
   *** Rust bindings generator 'bindgen' < 0.69.5 together with libclang >= 19.1
   *** may not work due to a bug (https://github.com/rust-lang/rust-bindgen/pull/2824),
   *** unless patched (like Debian's).
   ***   Your bindgen version:  0.65.1
   ***   Your libclang version: 20.1.7
   ***
   ***
   *** Please see Documentation/rust/quick-start.rst for details
   *** on how to set up the Rust support.
   ***
>> warning: variable does not need to be mutable
   --> rust/kernel/regulator.rs:295:29
   |
   295 |     pub fn try_into_enabled(mut self) -> Result<Regulator<Enabled>, Error<Disabled>> {
   |                             ----^^^^
   |                             |
   |                             help: remove this `mut`
   |
   = note: `#[warn(unused_mut)]` on by default
--
>> warning: variable does not need to be mutable
   --> rust/kernel/regulator.rs:324:30
   |
   324 |     pub fn try_into_disabled(mut self) -> Result<Regulator<Disabled>, Error<Enabled>> {
   |                              ----^^^^
   |                              |
   |                              help: remove this `mut`

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki