Re: [PATCH V2] efi/tpm: Fix the issue where the CC platforms event log header can't be correctly identified

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

Hi,

kernel test robot noticed the following build errors:

[auto build test ERROR on efi/next]
[also build test ERROR on char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus linus/master v6.16-rc4 next-20250704]
[cannot apply to intel-tdx/guest-next]
[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/yangge1116-126-com/efi-tpm-Fix-the-issue-where-the-CC-platforms-event-log-header-can-t-be-correctly-identified/20250705-182032
base:   https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git next
patch link:    https://lore.kernel.org/r/1751710616-24464-1-git-send-email-yangge1116%40126.com
patch subject: [PATCH V2] efi/tpm: Fix the issue where the CC platforms event log header can't be correctly identified
config: arc-randconfig-002-20250705 (https://download.01.org/0day-ci/archive/20250706/202507060016.n5ikMP6Q-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250706/202507060016.n5ikMP6Q-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/202507060016.n5ikMP6Q-lkp@intel.com/

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

   drivers/char/tpm/eventlog/tpm2.c: In function 'calc_tpm2_event_size':
>> drivers/char/tpm/eventlog/tpm2.c:40:25: error: implicit declaration of function 'cc_platform_has' [-Werror=implicit-function-declaration]
      40 |                         cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT));
         |                         ^~~~~~~~~~~~~~~
>> drivers/char/tpm/eventlog/tpm2.c:40:41: error: 'CC_ATTR_GUEST_STATE_ENCRYPT' undeclared (first use in this function)
      40 |                         cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT));
         |                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/char/tpm/eventlog/tpm2.c:40:41: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/char/tpm/eventlog/tpm2.c:41:1: warning: control reaches end of non-void function [-Wreturn-type]
      41 | }
         | ^
   cc1: some warnings being treated as errors


vim +/cc_platform_has +40 drivers/char/tpm/eventlog/tpm2.c

    24	
    25	/*
    26	 * calc_tpm2_event_size() - calculate the event size, where event
    27	 * is an entry in the TPM 2.0 event log. The event is of type Crypto
    28	 * Agile Log Entry Format as defined in TCG EFI Protocol Specification
    29	 * Family "2.0".
    30	
    31	 * @event: event whose size is to be calculated.
    32	 * @event_header: the first event in the event log.
    33	 *
    34	 * Returns size of the event. If it is an invalid event, returns 0.
    35	 */
    36	static size_t calc_tpm2_event_size(struct tcg_pcr_event2_head *event,
    37					   struct tcg_pcr_event *event_header)
    38	{
    39		return __calc_tpm2_event_size(event, event_header, false,
  > 40				cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT));
  > 41	}
    42	

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