[djiang:cxl-emulate-hdm 1/9] arch/x86/pci/mmconfig-shared.c:451: undefined reference to `efi'

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

Hi Bjorn,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/djiang/linux.git cxl-emulate-hdm
head:   6c7fe26eb2f67816411bb41a976a6c50056aa574
commit: b2b6d47f1b29b36472a90db110c9d2d421f04627 [1/9] x86/pci: Treat EfiMemoryMappedIO as reservation of ECAM space
config: i386-randconfig-a001 (https://download.01.org/0day-ci/archive/20230120/202301200823.art1eu2t-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/djiang/linux.git/commit/?id=b2b6d47f1b29b36472a90db110c9d2d421f04627
        git remote add djiang https://git.kernel.org/pub/scm/linux/kernel/git/djiang/linux.git
        git fetch --no-tags djiang cxl-emulate-hdm
        git checkout b2b6d47f1b29b36472a90db110c9d2d421f04627
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ld: arch/x86/pci/mmconfig-shared.o: in function `is_efi_reserved':
>> arch/x86/pci/mmconfig-shared.c:451: undefined reference to `efi'
>> ld: arch/x86/pci/mmconfig-shared.c:451: undefined reference to `efi'
>> ld: arch/x86/pci/mmconfig-shared.c:451: undefined reference to `efi'


vim +451 arch/x86/pci/mmconfig-shared.c

   445	
   446	static bool is_efi_reserved(u64 start, u64 end, enum e820_type not_used)
   447	{
   448		efi_memory_desc_t *md;
   449		u64 size, mmio_start, mmio_end;
   450	
 > 451		for_each_efi_memory_desc(md) {
   452			if (md->type == EFI_MEMORY_MAPPED_IO) {
   453				size = md->num_pages << EFI_PAGE_SHIFT;
   454				mmio_start = md->phys_addr;
   455				mmio_end = mmio_start + size - 1;
   456	
   457				if (mmio_start <= start && end <= mmio_end)
   458					return true;
   459			}
   460		}
   461	
   462		return false;
   463	}
   464	

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