[PATCH v5 11/22] erofs: register global fscache volume

[kernel test robot]

Hi Jeffle,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on trondmy-nfs/linux-next]
[also build test ERROR on rostedt-trace/for-next linus/master v5.17-rc8]
[cannot apply to xiang-erofs/dev-test dhowells-fs/fscache-next next-20220316]
[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/Jeffle-Xu/fscache-erofs-fscache-based-on-demand-read-semantics/20220316-214711
base:   git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next
config: hexagon-randconfig-r041-20220313 (https://download.01.org/0day-ci/archive/20220317/202203170512.Se1LRa68-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a6ec1e3d798f8eab43fb3a91028c6ab04e115fcb)
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/0day-ci/linux/commit/f52882624bb750e533d0ffa591c3903f08f6d8bb
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jeffle-Xu/fscache-erofs-fscache-based-on-demand-read-semantics/20220316-214711
        git checkout f52882624bb750e533d0ffa591c3903f08f6d8bb
        # 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=hexagon 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 >>):

>> ld.lld: error: undefined symbol: __fscache_relinquish_volume
   >>> referenced by fscache.c
   >>> erofs/fscache.o:(erofs_exit_fscache) in archive fs/built-in.a
   >>> referenced by fscache.c
   >>> erofs/fscache.o:(erofs_exit_fscache) in archive fs/built-in.a
--
>> ld.lld: error: undefined symbol: __fscache_acquire_volume
   >>> referenced by fscache.c
   >>> erofs/fscache.o:(erofs_init_fscache) in archive fs/built-in.a
   >>> referenced by fscache.c
   >>> erofs/fscache.o:(erofs_init_fscache) in archive fs/built-in.a

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