Re: [PATCH v4 2/2] fs: ext4: Modify inode-test.c to use KUnit parameterized testing feature

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

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Hi Arpitha,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on ext4/dev]
[also build test ERROR on linus/master v5.10-rc1 next-20201030]
[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]

url:    https://github.com/0day-ci/linux/commits/Arpitha-Raghunandan/kunit-Support-for-Parameterized-Testing/20201028-015018
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
config: x86_64-randconfig-a005-20201031 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 72ddd559b8aafef402091f8e192e025022e4ebef)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/2de1e52708cd83d1dc4c718876683f6809045a98
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Arpitha-Raghunandan/kunit-Support-for-Parameterized-Testing/20201028-015018
        git checkout 2de1e52708cd83d1dc4c718876683f6809045a98
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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 >>):

>> fs/ext4/inode-test.c:214:1: error: returning 'typeof ((test_data)[0]) *' (aka 'const struct timestamp_expectation *') from a function with result type 'void *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
   KUNIT_ARRAY_PARAM(ext4_inode, test_data);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/kunit/test.h:1735:10: note: expanded from macro 'KUNIT_ARRAY_PARAM'
                   return __next - (array) < ARRAY_SIZE((array)) ? __next : NULL;                  \
                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 error generated.

vim +214 fs/ext4/inode-test.c

   213	
 > 214	KUNIT_ARRAY_PARAM(ext4_inode, test_data);
   215	

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

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