tree:   https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/cifs-for-viro
head:   df803766d7a8e3e9214c3efd185bf31a1d8fcd46
commit: 3aea8f09e3e18aa0992ea89442388167a1eb6b35 [5/12] cifs: Implement splice_read to pass down ITER_BVEC not ITER_PIPE
config: x86_64-rhel-8.3-func
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/ammarfaizi2/linux-block/commit/3aea8f09e3e18aa0992ea89442388167a1eb6b35
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/cifs-for-viro
        git checkout 3aea8f09e3e18aa0992ea89442388167a1eb6b35
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

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

>> ERROR: modpost: "default_pipe_buf_ops" [fs/cifs/cifs.ko] undefined!

-- 
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https://01.org/lkp