linux-kernel - kernel/reboot.c:226: warning: Function parameter or struct member 'cmd' not described in 'do_kernel

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Message-ID: <202412171248.ro76Gqt1-lkp@intel.com>
Date: Tue, 17 Dec 2024 13:02:37 +0800
From: kernel test robot <lkp@...el.com>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Nathan Chancellor <nathan@...nel.org>
Subject: kernel/reboot.c:226: warning: Function parameter or struct member
 'cmd' not described in 'do_kernel_restart'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e
commit: 92ef432f027cffe0ff91ff2cbe9258d89ca53968 kbuild: support W=c and W=e shorthands for Kconfig
date:   1 year ago
config: m68k-allnoconfig (https://download.01.org/0day-ci/archive/20241217/202412171248.ro76Gqt1-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241217/202412171248.ro76Gqt1-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/202412171248.ro76Gqt1-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/reboot.c:226: warning: Function parameter or struct member 'cmd' not described in 'do_kernel_restart'
>> kernel/reboot.c:952: warning: Function parameter or struct member 'poweroff_delay_ms' not described in 'hw_failure_emergency_poweroff'
--
   lib/vsprintf.c: In function 'va_format':
>> lib/vsprintf.c:1683:9: warning: function 'va_format' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
    1683 |         buf += vsnprintf(buf, end > buf ? end - buf : 0, va_fmt->fmt, va);
         |         ^~~
--
>> lib/hweight.c:14: warning: Function parameter or struct member 'w' not described in '__sw_hweight32'
>> lib/hweight.c:14: warning: expecting prototype for hweightN(). Prototype was for __sw_hweight32() instead
--
   drivers/clk/clkdev.c: In function 'vclkdev_alloc':
>> drivers/clk/clkdev.c:173:17: warning: function 'vclkdev_alloc' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
     173 |                 vscnprintf(cla->dev_id, sizeof(cla->dev_id), dev_fmt, ap);
         |                 ^~~~~~~~~~


vim +226 kernel/reboot.c

b63adb979583ef Guenter Roeck 2014-09-26  213  
b63adb979583ef Guenter Roeck 2014-09-26  214  /**
b63adb979583ef Guenter Roeck 2014-09-26  215   *	do_kernel_restart - Execute kernel restart handler call chain
b63adb979583ef Guenter Roeck 2014-09-26  216   *
b63adb979583ef Guenter Roeck 2014-09-26  217   *	Calls functions registered with register_restart_handler.
b63adb979583ef Guenter Roeck 2014-09-26  218   *
b63adb979583ef Guenter Roeck 2014-09-26  219   *	Expected to be called from machine_restart as last step of the restart
b63adb979583ef Guenter Roeck 2014-09-26  220   *	sequence.
b63adb979583ef Guenter Roeck 2014-09-26  221   *
b63adb979583ef Guenter Roeck 2014-09-26  222   *	Restarts the system immediately if a restart handler function has been
b63adb979583ef Guenter Roeck 2014-09-26  223   *	registered. Otherwise does nothing.
b63adb979583ef Guenter Roeck 2014-09-26  224   */
b63adb979583ef Guenter Roeck 2014-09-26  225  void do_kernel_restart(char *cmd)
b63adb979583ef Guenter Roeck 2014-09-26 @226  {
b63adb979583ef Guenter Roeck 2014-09-26  227  	atomic_notifier_call_chain(&restart_handler_list, reboot_mode, cmd);
b63adb979583ef Guenter Roeck 2014-09-26  228  }
b63adb979583ef Guenter Roeck 2014-09-26  229  

:::::: The code at line 226 was first introduced by commit
:::::: b63adb979583ef185718d774d8162387db5589c0 kernel: add support for kernel restart handler call chain

:::::: TO: Guenter Roeck <linux@...ck-us.net>
:::::: CC: Guenter Roeck <linux@...ck-us.net>

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