Hi David,

I love your patch! Yet something to improve:

[auto build test ERROR on tip/perf/core]
[also build test ERROR on v5.11-rc4]
[cannot apply to linus/master dhowells-fs/fscache-next next-20210120]
[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/Network-fs-helper-library-fscache-kiocb-API/20210121-081953
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 9a7832ce3d920426a36cdd78eda4b3568d4d09e3
config: parisc-randconfig-c004-20210121 (attached as .config)
compiler: hppa-linux-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/98c99a8ba3cf2b8af9ecf2694729634b2a9e695c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review David-Howells/Network-fs-helper-library-fscache-kiocb-API/20210121-081953
        git checkout 98c99a8ba3cf2b8af9ecf2694729634b2a9e695c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc 

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 >>):

   hppa-linux-ld: fs/fscache/stats.o: in function `fscache_stats_show':
>> (.text+0x58c): undefined reference to `netfs_stats_show'

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