[mark:stacktrace/testing 1/1] ERROR: modpost: "kallsyms_lookup_size_offset" [lib/test_stacktrace/test_stacktrace.ko] undefined!

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git stacktrace/testing
head:   a8e8825116626f8c3e8be3bb889b6442a7465cb8
commit: a8e8825116626f8c3e8be3bb889b6442a7465cb8 [1/1] WIP: stacktrace tests
config: hexagon-randconfig-r041-20220412 (https://download.01.org/0day-ci/archive/20220413/202204131029.GIdIxZ9E-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project fe2478d44e4f7f191c43fef629ac7a23d0251e72)
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/mark/linux.git/commit/?id=a8e8825116626f8c3e8be3bb889b6442a7465cb8
        git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git
        git fetch --no-tags mark stacktrace/testing
        git checkout a8e8825116626f8c3e8be3bb889b6442a7465cb8
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash

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

All error/warnings (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "kallsyms_lookup_size_offset" [lib/test_stacktrace/test_stacktrace.ko] undefined!
--
>> lib/test_stacktrace/kunit.c:54:5: warning: no previous prototype for function 'st_find_func_idx' [-Wmissing-prototypes]
   int st_find_func_idx(struct st_data *st, void *func, int start)
       ^
   lib/test_stacktrace/kunit.c:54:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int st_find_func_idx(struct st_data *st, void *func, int start)
   ^
   static 
   1 warning generated.

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