linux-hardening - Re: [PATCH 1/4] kunit: Add APIs for managing devices

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Message-ID: <202312052114.VQD1viY5-lkp@intel.com>
Date: Tue, 5 Dec 2023 21:53:56 +0800
From: kernel test robot <lkp@...el.com>
To: davidgow@...gle.com, Rae Moar <rmoar@...gle.com>,
	Brendan Higgins <brendan.higgins@...ux.dev>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
	Matti Vaittinen <mazziesaccount@...il.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Shuah Khan <skhan@...uxfoundation.org>,
	Jonathan Corbet <corbet@....net>, Kees Cook <keescook@...omium.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, Maxime Ripard <mripard@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kselftest@...r.kernel.org,
	kunit-dev@...glegroups.com, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
	linux-sound@...r.kernel.org, David Gow <davidgow@...gle.com>
Subject: Re: [PATCH 1/4] kunit: Add APIs for managing devices

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on c8613be119892ccceffbc550b9b9d7d68b995c9e]

url:    https://github.com/intel-lab-lkp/linux/commits/davidgow-google-com/kunit-Add-APIs-for-managing-devices/20231205-153349
base:   c8613be119892ccceffbc550b9b9d7d68b995c9e
patch link:    https://lore.kernel.org/r/20231205-kunit_bus-v1-1-635036d3bc13%40google.com
patch subject: [PATCH 1/4] kunit: Add APIs for managing devices
config: powerpc-randconfig-r081-20231205 (https://download.01.org/0day-ci/archive/20231205/202312052114.VQD1viY5-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231205/202312052114.VQD1viY5-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/202312052114.VQD1viY5-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> lib/kunit/device.c:100:22: warning: no previous prototype for function '__kunit_device_register_internal' [-Wmissing-prototypes]
     100 | struct kunit_device *__kunit_device_register_internal(struct kunit *test,
         |                      ^
   lib/kunit/device.c:100:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     100 | struct kunit_device *__kunit_device_register_internal(struct kunit *test,
         | ^
         | static 
   1 warning generated.


vim +/__kunit_device_register_internal +100 lib/kunit/device.c

    99	
 > 100	struct kunit_device *__kunit_device_register_internal(struct kunit *test,
   101							      const char *name,
   102							      struct device_driver *drv)
   103	{
   104		struct kunit_device *kunit_dev;
   105		int err = -ENOMEM;
   106	
   107		kunit_dev = kzalloc(sizeof(struct kunit_device), GFP_KERNEL);
   108		if (!kunit_dev)
   109			return ERR_PTR(err);
   110	
   111		kunit_dev->owner = test;
   112	
   113		err = dev_set_name(&kunit_dev->dev, "%s.%s", test->name, name);
   114		if (err) {
   115			kfree(kunit_dev);
   116			return ERR_PTR(err);
   117		}
   118	
   119		/* Set the expected driver pointer, so we match. */
   120		kunit_dev->driver = drv;
   121	
   122		kunit_dev->dev.release = kunit_device_release;
   123		kunit_dev->dev.bus = &kunit_bus_type;
   124		kunit_dev->dev.parent = &kunit_bus;
   125	
   126		err = device_register(&kunit_dev->dev);
   127		if (err) {
   128			put_device(&kunit_dev->dev);
   129			return ERR_PTR(err);
   130		}
   131	
   132		kunit_add_action(test, device_unregister_wrapper, &kunit_dev->dev);
   133	
   134		return kunit_dev;
   135	}
   136	

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