linux-kernel - Re: [PATCH v5] panic: add panic_force_cpu= parameter to redirect panic to a specific CPU

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Message-ID: <202601092335.DbBERt3l-lkp@intel.com>
Date: Fri, 9 Jan 2026 23:19:34 +0100
From: kernel test robot <lkp@...el.com>
To: Pnina Feder <pnina.feder@...ileye.com>, akpm@...ux-foundation.org
Cc: oe-kbuild-all@...ts.linux.dev, pmladek@...e.com, bhe@...hat.com,
	linux-kernel@...r.kernel.org, lkp@...el.com, mgorman@...e.de,
	mingo@...hat.com, peterz@...radead.org, pnina.feder@...ileye.com,
	rostedt@...dmis.org, senozhatsky@...omium.org, tglx@...utronix.de,
	vkondra@...ileye.com
Subject: Re: [PATCH v5] panic: add panic_force_cpu= parameter to redirect
 panic to a specific CPU

Hi Pnina,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on linus/master v6.19-rc4 next-20260109]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Pnina-Feder/panic-add-panic_force_cpu-parameter-to-redirect-panic-to-a-specific-CPU/20260109-043725
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20260108203612.955769-1-pnina.feder%40mobileye.com
patch subject: [PATCH v5] panic: add panic_force_cpu= parameter to redirect panic to a specific CPU
config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20260109/202601092335.DbBERt3l-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260109/202601092335.DbBERt3l-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/202601092335.DbBERt3l-lkp@intel.com/

All warnings (new ones prefixed by >>):

   kernel/panic.c: In function 'do_panic_on_target_cpu':
>> kernel/panic.c:327:17: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'void *' [-Wformat=]
     327 |         panic("%s", info);
         |                ~^   ~~~~
         |                 |   |
         |                 |   void *
         |                 char *
         |                %p


vim +327 kernel/panic.c

   324	
   325	static void do_panic_on_target_cpu(void *info)
   326	{
 > 327		panic("%s", info);
   328	}
   329	

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