[linux-next:master 4218/8413] lib/kunit/test.c:764:38: warning: cast from 'void (*)(const void *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type

[kernel test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   53ab6975c12d1ad86c599a8927e8c698b144d669
commit: 57e3cded99e9c840bc5310878d0a7f4e7768a296 [4218/8413] kunit: kmalloc_array: Use kunit_add_action()
config: hexagon-randconfig-r045-20230612 (https://download.01.org/0day-ci/archive/20230613/202306130136.ZO9p5nTK-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=57e3cded99e9c840bc5310878d0a7f4e7768a296
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 57e3cded99e9c840bc5310878d0a7f4e7768a296
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash lib/kunit/

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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306130136.ZO9p5nTK-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> lib/kunit/test.c:764:38: warning: cast from 'void (*)(const void *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
     764 |         if (kunit_add_action_or_reset(test, (kunit_action_t *)kfree, data) != 0)
         |                                             ^~~~~~~~~~~~~~~~~~~~~~~
   lib/kunit/test.c:776:29: warning: cast from 'void (*)(const void *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
     776 |         kunit_release_action(test, (kunit_action_t *)kfree, (void *)ptr);
         |                                    ^~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.


vim +764 lib/kunit/test.c

   754	
   755	void *kunit_kmalloc_array(struct kunit *test, size_t n, size_t size, gfp_t gfp)
   756	{
   757		void *data;
   758	
   759		data = kmalloc_array(n, size, gfp);
   760	
   761		if (!data)
   762			return NULL;
   763	
 > 764		if (kunit_add_action_or_reset(test, (kunit_action_t *)kfree, data) != 0)
   765			return NULL;
   766	
   767		return data;
   768	}
   769	EXPORT_SYMBOL_GPL(kunit_kmalloc_array);
   770	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki