Re: [PATCH v2 bpf-next 1/2] bpf: introduce helper bpf_find_vma

[kernel test robot <lkp@intel.com>]

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Hi Song,

I love your patch! Yet something to improve:

[auto build test ERROR on bpf-next/master]

url:    https://github.com/0day-ci/linux/commits/Song-Liu/introduce-bpf_find_vma/20211104-150210
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: riscv-randconfig-r034-20211104 (attached as .config)
compiler: riscv64-linux-gcc (GCC) 11.2.0
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/e219efba8d04dede08b1d87fa1e8c5c01180caaf
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Song-Liu/introduce-bpf_find_vma/20211104-150210
        git checkout e219efba8d04dede08b1d87fa1e8c5c01180caaf
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=riscv 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 >>):

   riscv64-linux-ld: kernel/bpf/task_iter.o: in function `bpf_find_vma':
   task_iter.c:(.text+0x3dc): undefined reference to `mmap_unlock_work'
>> riscv64-linux-ld: task_iter.c:(.text+0x3e0): undefined reference to `mmap_unlock_work'
   riscv64-linux-ld: task_iter.c:(.text+0x400): undefined reference to `mmap_unlock_work'

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

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