linux-kernel - drivers/watchdog/it87_wdt.c:321: warning: Function parameter or member 'wdd' not described in 'wdt_set

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Date:   Sun, 12 Nov 2023 04:59:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Wim Van Sebroeck <wim@...ana.be>
Subject: drivers/watchdog/it87_wdt.c:321: warning: Function parameter or
 member 'wdd' not described in 'wdt_set_timeout'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3ca112b71f35dd5d99fc4571a56b5fc6f0c15814
commit: 1d7b80394c48a56c705733cb6c044199ffbf1dfd watchdog: it87: Convert to use watchdog core infrastructure
date:   6 years ago
config: x86_64-randconfig-a001-20230604 (https://download.01.org/0day-ci/archive/20231112/202311120459.240skMhF-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/20231112/202311120459.240skMhF-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/202311120459.240skMhF-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/watchdog/it87_wdt.c:31:
   include/linux/module.h:131:13: warning: 'init_module' specifies less restrictive attribute than its target 'it87_wdt_init': 'cold' [-Wmissing-attributes]
     131 |         int init_module(void) __attribute__((alias(#initfn)));
         |             ^~~~~~~~~~~
   drivers/watchdog/it87_wdt.c:557:1: note: in expansion of macro 'module_init'
     557 | module_init(it87_wdt_init);
         | ^~~~~~~~~~~
   drivers/watchdog/it87_wdt.c:367:19: note: 'init_module' target declared here
     367 | static int __init it87_wdt_init(void)
         |                   ^~~~~~~~~~~~~
   include/linux/module.h:137:14: warning: 'cleanup_module' specifies less restrictive attribute than its target 'it87_wdt_exit': 'cold' [-Wmissing-attributes]
     137 |         void cleanup_module(void) __attribute__((alias(#exitfn)));
         |              ^~~~~~~~~~~~~~
   drivers/watchdog/it87_wdt.c:558:1: note: in expansion of macro 'module_exit'
     558 | module_exit(it87_wdt_exit);
         | ^~~~~~~~~~~
   drivers/watchdog/it87_wdt.c:529:20: note: 'cleanup_module' target declared here
     529 | static void __exit it87_wdt_exit(void)
         |                    ^~~~~~~~~~~~~
>> drivers/watchdog/it87_wdt.c:321: warning: Function parameter or member 'wdd' not described in 'wdt_set_timeout'


vim +321 drivers/watchdog/it87_wdt.c

e1fee94f346387 Oliver Schuster 2008-03-05  309  
e1fee94f346387 Oliver Schuster 2008-03-05  310  /**
e1fee94f346387 Oliver Schuster 2008-03-05  311   *	wdt_set_timeout - set a new timeout value with watchdog ioctl
e1fee94f346387 Oliver Schuster 2008-03-05  312   *	@t: timeout value in seconds
e1fee94f346387 Oliver Schuster 2008-03-05  313   *
dfb0b8eae1f78c Ondrej Zajicek  2010-09-14  314   *	The hardware device has a 8 or 16 bit watchdog timer (depends on
dfb0b8eae1f78c Ondrej Zajicek  2010-09-14  315   *	chip version) that can be configured to count seconds or minutes.
e1fee94f346387 Oliver Schuster 2008-03-05  316   *
e1fee94f346387 Oliver Schuster 2008-03-05  317   *	Used within WDIOC_SETTIMEOUT watchdog device ioctl.
e1fee94f346387 Oliver Schuster 2008-03-05  318   */
e1fee94f346387 Oliver Schuster 2008-03-05  319  
1d7b80394c48a5 Guenter Roeck   2017-06-10  320  static int wdt_set_timeout(struct watchdog_device *wdd, unsigned int t)
e1fee94f346387 Oliver Schuster 2008-03-05 @321  {
1d7b80394c48a5 Guenter Roeck   2017-06-10  322  	int ret = 0;
e1fee94f346387 Oliver Schuster 2008-03-05  323  
dfb0b8eae1f78c Ondrej Zajicek  2010-09-14  324  	if (t > max_units)
1d7b80394c48a5 Guenter Roeck   2017-06-10  325  		t = wdt_round_time(t);
e1fee94f346387 Oliver Schuster 2008-03-05  326  
1d7b80394c48a5 Guenter Roeck   2017-06-10  327  	wdd->timeout = t;
e1fee94f346387 Oliver Schuster 2008-03-05  328  
1d7b80394c48a5 Guenter Roeck   2017-06-10  329  	if (watchdog_hw_running(wdd))
1d7b80394c48a5 Guenter Roeck   2017-06-10  330  		ret = wdt_update_timeout();
e1fee94f346387 Oliver Schuster 2008-03-05  331  
a134b825608df6 Nat Gurumoorthy 2011-05-09  332  	return ret;
a134b825608df6 Nat Gurumoorthy 2011-05-09  333  }
e1fee94f346387 Oliver Schuster 2008-03-05  334  

:::::: The code at line 321 was first introduced by commit
:::::: e1fee94f346387739e683b31815ab54dc0a30bd6 [WATCHDOG] add watchdog driver IT8716 IT8726 IT8712J/K

:::::: TO: Oliver Schuster <olivers137@....com>
:::::: CC: Wim Van Sebroeck <wim@...ana.be>

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