ld.lld: error: undefined symbol: bpf_preload_ops

[kernel test robot]

Hi Alexei,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   23859ae44402f4d935b9ee548135dd1e65e2cbf4
commit: d71fa5c9763c24dd997a2fa4feb7a13a95bab42c bpf: Add kernel module with user mode driver that populates bpffs.
date:   2 months ago
config: x86_64-randconfig-r016-20201029 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 772aaa602383cf82795572ebcd86b0e660f3579f)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d71fa5c9763c24dd997a2fa4feb7a13a95bab42c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d71fa5c9763c24dd997a2fa4feb7a13a95bab42c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: bpf_preload_ops
   >>> referenced by bpf_preload_kern.c:83 (kernel/bpf/preload/bpf_preload_kern.c:83)
   >>> bpf/preload/bpf_preload_kern.o:(fini_umd) in archive kernel/built-in.a
   >>> referenced by bpf_preload_kern.c:83 (kernel/bpf/preload/bpf_preload_kern.c:83)
   >>> bpf/preload/bpf_preload_kern.o:(fini_umd) in archive kernel/built-in.a
   >>> referenced by bpf_preload_kern.c:77 (kernel/bpf/preload/bpf_preload_kern.c:77)
   >>> bpf/preload/bpf_preload_kern.o:(load_umd) in archive kernel/built-in.a
   >>> referenced 1 more times

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

Attachment: .config.gz
Description: application/gzip