[asahilinux:nvme/dev 17/18] ld.lld: error: undefined symbol: mbox_send_message

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

tree:   https://github.com/AsahiLinux/linux nvme/dev
head:   d25eee8aced31cf92944992bec41022e6f837daf
commit: fd7c0ced9b5e58028c66dde6cb54fa61a19283b9 [17/18] WIP: soc: apple: rtkit: Add RTKit library
config: arm64-randconfig-r014-20211210 (https://download.01.org/0day-ci/archive/20211210/202112102327.HUfIS2jd-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/AsahiLinux/linux/commit/fd7c0ced9b5e58028c66dde6cb54fa61a19283b9
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux nvme/dev
        git checkout fd7c0ced9b5e58028c66dde6cb54fa61a19283b9
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: mbox_send_message
   >>> referenced by rtkit.c
   >>> soc/apple/rtkit.o:(apple_rtkit_send_message) in archive drivers/built-in.a
--
>> ld.lld: error: undefined symbol: mbox_request_channel_byname
   >>> referenced by rtkit.c
   >>> soc/apple/rtkit.o:(apple_rtkit_init) in archive drivers/built-in.a
--
>> ld.lld: error: undefined symbol: mbox_request_channel
   >>> referenced by rtkit.c
   >>> soc/apple/rtkit.o:(apple_rtkit_init) in archive drivers/built-in.a
--
>> ld.lld: error: undefined symbol: mbox_free_channel
   >>> referenced by rtkit.c
   >>> soc/apple/rtkit.o:(apple_rtkit_free) in archive drivers/built-in.a

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org