linux-kernel - drivers/base/power/domain_governor.c:236: warning: cannot understand function prototype: 'struct dev_power_governor pm_domain_always_on

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Date:   Sun, 3 Dec 2023 14:31:43 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sascha Hauer <s.hauer@...gutronix.de>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        Daniel Kurtz <djkurtz@...omium.org>
Subject: drivers/base/power/domain_governor.c:236: warning: cannot understand
 function prototype: 'struct dev_power_governor pm_domain_always_on_gov = '

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   815fb87b753055df2d9e50f6cd80eb10235fe3e9
commit: c84e358718a66f76ac0de1681d15d8d0c68fcdab soc: Mediatek: Add SCPSYS power domain driver
date:   8 years ago
config: x86_64-buildonly-randconfig-006-20230906 (https://download.01.org/0day-ci/archive/20231203/202312030241.E2FA2zJY-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231203/202312030241.E2FA2zJY-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/202312030241.E2FA2zJY-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/kobject.h:21,
                    from include/linux/device.h:17,
                    from include/linux/pm_domain.h:12,
                    from drivers/base/power/domain_governor.c:10:
   include/linux/sysfs.h: In function 'sysfs_get_dirent':
   include/linux/sysfs.h:496:44: warning: pointer targets in passing argument 2 of 'kernfs_find_and_get' differ in signedness [-Wpointer-sign]
     496 |         return kernfs_find_and_get(parent, name);
         |                                            ^~~~
         |                                            |
         |                                            const unsigned char *
   In file included from include/linux/sysfs.h:15:
   include/linux/kernfs.h:424:57: note: expected 'const char *' but argument is of type 'const unsigned char *'
     424 | kernfs_find_and_get(struct kernfs_node *kn, const char *name)
         |                                             ~~~~~~~~~~~~^~~~
>> drivers/base/power/domain_governor.c:236: warning: cannot understand function prototype: 'struct dev_power_governor pm_domain_always_on_gov = '


vim +236 drivers/base/power/domain_governor.c

e59a8db8d9b7c0 Rafael J. Wysocki 2012-01-14  232  
925b44a273aa8c Mark Brown        2011-12-08  233  /**
925b44a273aa8c Mark Brown        2011-12-08  234   * pm_genpd_gov_always_on - A governor implementing an always-on policy
925b44a273aa8c Mark Brown        2011-12-08  235   */
925b44a273aa8c Mark Brown        2011-12-08 @236  struct dev_power_governor pm_domain_always_on_gov = {

:::::: The code at line 236 was first introduced by commit
:::::: 925b44a273aa8c4c23c006c1228aacd538eead09 PM / Domains: Provide an always on power domain governor

:::::: TO: Mark Brown <broonie@...nsource.wolfsonmicro.com>
:::::: CC: Rafael J. Wysocki <rjw@...k.pl>

-- 
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https://github.com/intel/lkp-tests/wiki