[PATCH] afs: Enable multipage folio support

[kernel test robot]

Hi David,

I love your patch! Yet something to improve:

[auto build test ERROR on dhowells-fs/fscache-next]
[also build test ERROR on linux/master linus/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/David-Howells/afs-Enable-multipage-folio-support/20220226-075436
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-next
config: i386-randconfig-a005 (https://download.01.org/0day-ci/archive/20220226/202202261524.4tAqmT0a-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/91637acf6da0c809e1bedc59696d6bc0a8604f03
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review David-Howells/afs-Enable-multipage-folio-support/20220226-075436
        git checkout 91637acf6da0c809e1bedc59696d6bc0a8604f03
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

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

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "PageHeadHuge" [fs/afs/kafs.ko] undefined!

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