[PATCH] error path improvement in dlpar add

[kernel test robot]

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on powerpc/next]
[also build test WARNING on powerpc/fixes linus/master v6.19-rc7 next-20260126]
[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/wenxiong-linux-ibm-com/error-path-improvement-in-dlpar-add/20260127-121714
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
patch link:    https://lore.kernel.org/r/20260127021845.2326-1-wenxiong%40linux.ibm.com
patch subject: [PATCH] error path improvement in dlpar add
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20260127/202601271847.dv1oYfPw-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260127/202601271847.dv1oYfPw-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601271847.dv1oYfPw-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/asm-generic/bug.h:31,
                    from arch/powerpc/include/asm/bug.h:116,
                    from include/linux/bug.h:5,
                    from include/linux/fortify-string.h:6,
                    from include/linux/string.h:386,
                    from include/linux/uuid.h:11,
                    from include/linux/mod_devicetable.h:14,
                    from include/linux/pci.h:27,
                    from arch/powerpc/kernel/pci-hotplug.c:13:
   arch/powerpc/kernel/pci-hotplug.c: In function 'pci_hp_add_devices':
>> include/linux/kern_levels.h:5:25: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
       5 | #define KERN_SOH        "\001"          /* ASCII Start Of Header */
         |                         ^~~~~~
   include/linux/printk.h:484:25: note: in definition of macro 'printk_index_wrap'
     484 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
         |                         ^~~~
   include/linux/printk.h:555:9: note: in expansion of macro 'printk'
     555 |         printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~
   include/linux/kern_levels.h:11:25: note: in expansion of macro 'KERN_SOH'
      11 | #define KERN_ERR        KERN_SOH "3"    /* error conditions */
         |                         ^~~~~~~~
   include/linux/printk.h:555:16: note: in expansion of macro 'KERN_ERR'
     555 |         printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
         |                ^~~~~~~~
   arch/powerpc/kernel/pci-hotplug.c:182:17: note: in expansion of macro 'pr_err'
     182 |                 pr_err("%s: unable to add hotplug pci device!\n");
         |                 ^~~~~~


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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