Re: [RFC PATCH] tpm, tpm_vtpm_proxy: boot-time TPM

[kernel test robot <lkp@intel.com>]

Hi Jarkko,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on char-misc/char-misc-testing]
[also build test ERROR on char-misc/char-misc-next char-misc/char-misc-linus linus/master v6.16-rc6 next-20250716]
[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/Jarkko-Sakkinen/tpm-tpm_vtpm_proxy-boot-time-TPM/20250716-201945
base:   char-misc/char-misc-testing
patch link:    https://lore.kernel.org/r/20250716121823.173949-1-jarkko%40kernel.org
patch subject: [RFC PATCH] tpm, tpm_vtpm_proxy: boot-time TPM
config: s390-randconfig-001-20250717 (https://download.01.org/0day-ci/archive/20250717/202507171525.4Yz1y9Uv-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250717/202507171525.4Yz1y9Uv-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507171525.4Yz1y9Uv-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   drivers/char/tpm/tpm_vtpm_proxy.c: In function 'vtpmx_supplicant_init':
>> drivers/char/tpm/tpm_vtpm_proxy.c:699:39: error: initializer element is not constant
     static const char * const argv[] = { supplicant, NULL };
                                          ^~~~~~~~~~
   drivers/char/tpm/tpm_vtpm_proxy.c:699:39: note: (near initialization for 'argv[0]')
   drivers/char/tpm/tpm_vtpm_proxy.c: In function 'vtpmx_init':
>> drivers/char/tpm/tpm_vtpm_proxy.c:727:24: error: 'vtpmx_miscdev' undeclared (first use in this function); did you mean 'vtpmx_init'?
     return misc_register(&vtpmx_miscdev);
                           ^~~~~~~~~~~~~
                           vtpmx_init
   drivers/char/tpm/tpm_vtpm_proxy.c:727:24: note: each undeclared identifier is reported only once for each function it appears in
   At top level:
>> drivers/char/tpm/tpm_vtpm_proxy.c:719:12: warning: 'vtpmx_init' defined but not used [-Wunused-function]
    static int vtpmx_init(void)
               ^~~~~~~~~~


vim +699 drivers/char/tpm/tpm_vtpm_proxy.c

   696	
   697	static int vtpmx_supplicant_init(void)
   698	{
 > 699		static const char * const argv[] = { supplicant, NULL };
   700		struct subprocess_info *info;
   701		int ret;
   702	
   703		if (!supplicant)
   704			return 0;
   705	
   706		info = call_usermodehelper_setup(argv[0], (char **)argv, NULL,
   707						 GFP_KERNEL, vtpmx_supplicant_setup,
   708						 vtpmx_supplicant_cleanup, NULL);
   709		if (!info)
   710			return -ENOMEM;
   711	
   712		ret = call_usermodehelper_exec(info, UMH_KILLABLE | UMH_NO_WAIT);
   713		if (ret)
   714			return ret;
   715	
   716		return 0;
   717	}
   718	
 > 719	static int vtpmx_init(void)
   720	{
   721		int ret;
   722	
   723		ret = vtpmx_supplicant_init();
   724		if (ret)
   725			return ret;
   726	
 > 727		return misc_register(&vtpmx_miscdev);
   728	}
   729	

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