[ardb:x86-efi-zboot 28/29] drivers/firmware/efi/libstub/x86-stub.c:1059:13: error: call to undeclared function 'early_is_sevsnp_guest'; ISO C99 and later do not support implicit function declarations

[ardb:x86-efi-zboot 28/29] drivers/firmware/efi/libstub/x86-stub.c:1059:13: error: call to undeclared function 'early_is_sevsnp_guest'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git x86-efi-zboot
head:   b6f238d2e8720acf63467aa0d48d7fc4e31c07c2
commit: 7a69275e4b87b5b7a64423c76234bb7d8da60107 [28/29] x86/boot: Move memory acceptance logic into the EFI stub
config: x86_64-randconfig-006-20251227 (https://download.01.org/0day-ci/archive/20251227/202512272254.zE43KBLL-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251227/202512272254.zE43KBLL-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/202512272254.zE43KBLL-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/firmware/efi/libstub/x86-stub.c:1059:13: error: call to undeclared function 'early_is_sevsnp_guest'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1059 |         } else if (early_is_sevsnp_guest()) {
         |                    ^
   drivers/firmware/efi/libstub/x86-stub.c:1059:13: note: did you mean 'early_is_tdx_guest'?
   drivers/firmware/efi/libstub/x86-stub.c:1034:13: note: 'early_is_tdx_guest' declared here
    1034 | static bool early_is_tdx_guest(void)
         |             ^
   1 error generated.


vim +/early_is_sevsnp_guest +1059 drivers/firmware/efi/libstub/x86-stub.c

  1052	
  1053	void arch_accept_memory(phys_addr_t start, phys_addr_t end)
  1054	{
  1055		/* Platform-specific memory-acceptance call goes here */
  1056		if (early_is_tdx_guest()) {
  1057			if (!tdx_accept_memory(start, end))
  1058				panic("TDX: Failed to accept memory\n");
> 1059		} else if (early_is_sevsnp_guest()) {

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