Hi,

On 2023-06-13 at 20:48:21 +0800, kernel test robot [off-list ref] wrote:

Hi Frank,

kernel test robot noticed the following build errors:

[auto build test ERROR on v6.4-rc6]
[also build test ERROR on linus/master]
[cannot apply to clk/clk-next next-20230613]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Frank-Oltmanns/clk-fractional-divider-Improve-approximation-when-zero-based/20230613-163903
base:   v6.4-rc6
patch link:    https://lore.kernel.org/r/20230613083626.227476-3-frank%40oltmanns.dev
patch subject: [PATCH v2 2/2] clk: tests: Add tests for fractional divisor approximation
config: csky-randconfig-r011-20230612 (https://download.01.org/0day-ci/archive/20230613/202306132038.nUB6hmCv-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout v6.4-rc6
        b4 shazam https://lore.kernel.org/r/20230613083626.227476-3-frank@oltmanns.dev (local)
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=csky olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202306132038.nUB6hmCv-lkp@intel.com/ (local)

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

quoted

quoted

ERROR: modpost: "clk_fractional_divider_general_approximation" [drivers/clk/clk_test.ko] undefined!

The issue seems to be that clk_fractional_divider_general_approximation
is not exported as a symbol, while the config builds the clk_test as a
module:
CONFIG_CLK_KUNIT_TEST=m

If I'm not mistaken, this means that I can't test
clk_fractional_divider_general_approximation directly. Instead I'd have
to test it using clk_fractional_divider_ops.round_rate.

Can someone more knowlegdable than me please confirm if my understanding
is correct?

Thanks,
  Frank

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