[intel-tdx:guest-unaccepted-memory 11/14] ld.lld: error: undefined symbol: arch_kexec_load

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

tree:   https://github.com/intel/tdx.git guest-unaccepted-memory
head:   86fb61d5824802e1b7c4c8eb1b34029024f52ee6
commit: 820c5c338451079677510d4183ba5d5dc314c030 [11/14] x86: Disable kexec if system has unaccepted memory
config: x86_64-randconfig-a015-20220815 (https://download.01.org/0day-ci/archive/20220817/202208171435.ZwLactew-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project aed5e3bea138ce581d682158eb61c27b3cfdd6ec)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel/tdx/commit/820c5c338451079677510d4183ba5d5dc314c030
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest-unaccepted-memory
        git checkout 820c5c338451079677510d4183ba5d5dc314c030
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 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.lld: error: undefined symbol: arch_kexec_load
   >>> referenced by kexec.c:198 (kernel/kexec.c:198)
   >>>               vmlinux.o:(__x64_sys_kexec_load)
   >>> referenced by kexec_file.c:332 (kernel/kexec_file.c:332)
   >>>               vmlinux.o:(__x64_sys_kexec_file_load)

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