Re: [PATCH v5 07/10] kunit: string-stream: Decouple string_stream from kunit

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

Hi Richard,

kernel test robot noticed the following build warnings:

[auto build test WARNING on shuah-kselftest/kunit]
[also build test WARNING on shuah-kselftest/kunit-fixes linus/master v6.5-rc7 next-20230824]
[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/Richard-Fitzgerald/kunit-string-stream-Don-t-create-a-fragment-for-empty-strings/20230824-223722
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git kunit
patch link:    https://lore.kernel.org/r/20230824143129.1957914-8-rf%40opensource.cirrus.com
patch subject: [PATCH v5 07/10] kunit: string-stream: Decouple string_stream from kunit
config: hexagon-randconfig-001-20230825 (https://download.01.org/0day-ci/archive/20230825/202308251401.n2nyRNLW-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230825/202308251401.n2nyRNLW-lkp@intel.com/reproduce)

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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308251401.n2nyRNLW-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> lib/kunit/string-stream-test.c:19:25: warning: cast from 'void (*)(const void *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
      19 |         kunit_add_action(test, (kunit_action_t *)kfree, (void *)str);
         |                                ^~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +19 lib/kunit/string-stream-test.c

    13	
    14	static char *get_concatenated_string(struct kunit *test, struct string_stream *stream)
    15	{
    16		char *str = string_stream_get_string(stream);
    17	
    18		KUNIT_ASSERT_NOT_ERR_OR_NULL(test, str);
  > 19		kunit_add_action(test, (kunit_action_t *)kfree, (void *)str);
    20	
    21		return str;
    22	}
    23	

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