[ammarfaizi2-block:google/android/kernel/common/android-4.19-stable 1054/9999] undefined reference to `iommu_debugfs_top'

[ammarfaizi2-block:google/android/kernel/common/android-4.19-stable 1054/9999] undefined reference to `iommu_debugfs_top'

[kernel test robot]

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android-4.19-stable
head:   a54c48f848868b38e9a51c1119aa92dfe443cac4
commit: e24979f0e7bff01a70f00a01fccc5d62f6f980aa [1054/9999] ANDROID: GKI: iommu: Snapshot of vendor changes
config: microblaze-randconfig-m031-20220314 (https://download.01.org/0day-ci/archive/20220316/202203161802.UKUuyUOa-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 11.2.0
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/ammarfaizi2/linux-block/commit/e24979f0e7bff01a70f00a01fccc5d62f6f980aa
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android-4.19-stable
        git checkout e24979f0e7bff01a70f00a01fccc5d62f6f980aa
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=microblaze 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 >>):

   microblaze-linux-ld: drivers/iommu/io-pgtable.o: in function `io_pgtable_init':
>> (.init.text+0x10): undefined reference to `iommu_debugfs_top'

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