[ast:syscall 2/7] aarch64-linux-ld: kernel/bpf/syscall.o:undefined reference to `bpf_prog_test_run_syscall'

[ast:syscall 2/7] aarch64-linux-ld: kernel/bpf/syscall.o:undefined reference to `bpf_prog_test_run_syscall'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git syscall
head:   47fe65ef6f93a607b836a1d07c7bbec38c0d5ffb
commit: 18a0e55c7c80fa28fe3f5f127023505fbefca8ae [2/7] bpf: Introduce bpf_sys_bpf() helper and program type.
config: arm64-randconfig-m031-20210226 (attached as .config)
compiler: aarch64-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://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git/commit/?id=18a0e55c7c80fa28fe3f5f127023505fbefca8ae
        git remote add ast https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git
        git fetch --no-tags ast syscall
        git checkout 18a0e55c7c80fa28fe3f5f127023505fbefca8ae
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

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 >>):

>> aarch64-linux-ld: kernel/bpf/syscall.o:(.rodata+0x14a0): undefined reference to `bpf_prog_test_run_syscall'

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

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