Re: [PATCH v5 6/6] selftests: prctl: Add test for long thread names

Hi André,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 73e3f0710014fe6d4ed98cfc02292f6121db7558]

url:    https://github.com/intel-lab-lkp/linux/commits/Andr-Almeida/treewide-Get-rid-of-get_task_comm/20260827-152300
base:   73e3f0710014fe6d4ed98cfc02292f6121db7558
patch link:    https://lore.kernel.org/r/20260827-tonyk-long_name-v5-6-5fa843782a00%40igalia.com
patch subject: [PATCH v5 6/6] selftests: prctl: Add test for long thread names
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20260830/202608302318.ORNqwjNf-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260830/202608302318.ORNqwjNf-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 [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202608302318.ORNqwjNf-lkp@intel.com/ (local)

All warnings (new ones prefixed by >>):

   In file included from include/asm-generic/bug.h:31,
                    from arch/m68k/include/asm/bug.h:32,
                    from include/linux/bug.h:5,
                    from include/linux/slab.h:15,
                    from include/linux/xattr.h:15,
                    from security/smack/smack_lsm.c:18:
   security/smack/smack_lsm.c: In function 'smk_bu_tsk_to_obj':
   security/smack/smack_lsm.c:150:22: error: implicit declaration of function 'get_task_comm'; did you mean 'set_task_comm'? [-Wimplicit-function-declaration]
     150 |                 acc, get_task_comm(comm, tsk), note);
         |                      ^~~~~~~~~~~~~
   include/linux/printk.h:483:33: note: in definition of macro 'printk_index_wrap'
     483 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
         |                                 ^~~~~~~~~~~
   include/linux/printk.h:584:9: note: in expansion of macro 'printk'
     584 |         printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~
   security/smack/smack_lsm.c:148:9: note: in expansion of macro 'pr_info'
     148 |         pr_info("Smack %s: (%s %s %s) %s %s\n", smk_bu_mess[rc],
         |         ^~~~~~~

quoted

include/linux/kern_levels.h:5:25: warning: format '%s' expects argument of type 'char *', but argument 6 has type 'int' [-Wformat=]

       5 | #define KERN_SOH        "\001"          /* ASCII Start Of Header */
         |                         ^~~~~~
   include/linux/printk.h:483:25: note: in definition of macro 'printk_index_wrap'
     483 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
         |                         ^~~~
   include/linux/printk.h:584:9: note: in expansion of macro 'printk'
     584 |         printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~
   include/linux/kern_levels.h:14:25: note: in expansion of macro 'KERN_SOH'
      14 | #define KERN_INFO       KERN_SOH "6"    /* informational */
         |                         ^~~~~~~~
   include/linux/printk.h:584:16: note: in expansion of macro 'KERN_INFO'
     584 |         printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
         |                ^~~~~~~~~
   security/smack/smack_lsm.c:148:9: note: in expansion of macro 'pr_info'
     148 |         pr_info("Smack %s: (%s %s %s) %s %s\n", smk_bu_mess[rc],
         |         ^~~~~~~


vim +5 include/linux/kern_levels.h

314ba3520e513a Joe Perches 2012-07-30  4  
04d2c8c83d0e3a Joe Perches 2012-07-30 @5  #define KERN_SOH	"\001"		/* ASCII Start Of Header */
04d2c8c83d0e3a Joe Perches 2012-07-30  6  #define KERN_SOH_ASCII	'\001'
04d2c8c83d0e3a Joe Perches 2012-07-30  7  

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