[trondmy-nfs-2.6:testing 42/44] dir.c:undefined reference to `xxh32'

[kernel test robot]

tree:   git://git.linux-nfs.org/projects/trondmy/nfs-2.6.git testing
head:   3882cc488a3048791d7f06393d3e7c55ba3eda6f
commit: 5d2f1b8a2961967f7712baaea33b6e83daf732f8 [42/44] NFS: Convert readdir page cache to use a cookie based index
config: arm-lpd270_defconfig (https://download.01.org/0day-ci/archive/20220224/202202241112.4T2V8mEP-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-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
        git remote add trondmy-nfs-2.6 git://git.linux-nfs.org/projects/trondmy/nfs-2.6.git
        git fetch --no-tags trondmy-nfs-2.6 testing
        git checkout 5d2f1b8a2961967f7712baaea33b6e83daf732f8
        # 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=arm SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: fs/nfs/dir.o: in function `nfs_readdir_page_get_locked':
>> dir.c:(.text+0x234c): undefined reference to `xxh32'

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