tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter-2
head:   23676c28d1a9add6ea09f19ca89b71be994a4b79
commit: be401b99396d9299b6e66ff061f722c275441d60 [66/67] nfs: Convert to new fscache volume/cookie API
config: x86_64-rhel-8.3 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=be401b99396d9299b6e66ff061f722c275441d60
        git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
        git fetch --no-tags dhowells-fs fscache-iter-2
        git checkout be401b99396d9299b6e66ff061f722c275441d60
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 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 >>):

   ld: fs/nfs/inode.o: in function `nfs_set_cache_invalid':
>> inode.c:(.text+0x9f8): undefined reference to `__fscache_invalidate'
   ld: fs/nfs/inode.o: in function `nfs_clear_invalid_mapping':
   inode.c:(.text+0x3afc): undefined reference to `__fscache_invalidate'
   ld: fs/nfs/direct.o: in function `nfs_file_direct_write':
>> direct.c:(.text+0x1d44): undefined reference to `__fscache_invalidate'
   ld: fs/nfs/write.o: in function `nfs_writepage_setup':
>> write.c:(.text+0x3d8f): undefined reference to `__fscache_invalidate'
   ld: fs/nfs/fscache.o: in function `nfs_fscache_open_file':
>> fscache.c:(.text+0x128): undefined reference to `__fscache_unuse_cookie'
>> ld: fscache.c:(.text+0x162): undefined reference to `__fscache_use_cookie'
   ld: fs/nfs/fscache.o: in function `nfs_fscache_get_super_cookie':
>> fscache.c:(.text+0x43b): undefined reference to `__fscache_acquire_volume'
   ld: fs/nfs/fscache.o: in function `nfs_fscache_release_super_cookie':
>> fscache.c:(.text+0x52b): undefined reference to `__fscache_relinquish_volume'
   ld: fs/nfs/fscache.o: in function `nfs_fscache_init_inode':
>> fscache.c:(.text+0x653): undefined reference to `__fscache_acquire_cookie'
   ld: fs/nfs/fscache.o: in function `nfs_fscache_clear_inode':
>> fscache.c:(.text+0x6c6): undefined reference to `__fscache_relinquish_cookie'
>> ld: fscache.c:(.text+0x749): undefined reference to `__fscache_unuse_cookie'
   ld: fs/nfs/fscache.o: in function `__nfs_readpage_from_fscache':
>> fscache.c:(.text+0x7c0): undefined reference to `__fscache_fallback_read_page'
   ld: fs/nfs/fscache.o: in function `__nfs_readpage_to_fscache':
>> fscache.c:(.text+0x8b4): undefined reference to `__fscache_fallback_write_page'

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