Re: [PATCH 2/5] ext4: add test_mb_mark_used_cost to estimate cost of mb_mark_used

[kernel test robot]

Hi Kemeng,

kernel test robot noticed the following build errors:

[auto build test ERROR on tytso-ext4/dev]
[also build test ERROR on linus/master v6.9-rc1 next-20240328]
[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/Kemeng-Shi/ext4-keep-prefetch_grp-and-nr-consistent/20240326-214754
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
patch link:    https://lore.kernel.org/r/20240326213823.528302-3-shikemeng%40huaweicloud.com
patch subject: [PATCH 2/5] ext4: add test_mb_mark_used_cost to estimate cost of mb_mark_used
config: x86_64-randconfig-072-20240329 (https://download.01.org/0day-ci/archive/20240329/202403291544.lxme27eF-lkp@xxxxxxxxx/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240329/202403291544.lxme27eF-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403291544.lxme27eF-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   In file included from include/kunit/static_stub.h:18:0,
                    from fs/ext4/mballoc.c:21:
>> fs/ext4/mballoc-test.c:959:10: error: initializer element is not constant
             slow_attr),
             ^
   include/kunit/test.h:218:13: note: in definition of macro 'KUNIT_CASE_PARAM_ATTR'
        .attr = attributes, .module_name = KBUILD_MODNAME}
                ^~~~~~~~~~
   fs/ext4/mballoc-test.c:959:10: note: (near initialization for 'mbt_test_cases[6].attr')
             slow_attr),
             ^
   include/kunit/test.h:218:13: note: in definition of macro 'KUNIT_CASE_PARAM_ATTR'
        .attr = attributes, .module_name = KBUILD_MODNAME}
                ^~~~~~~~~~


vim +959 fs/ext4/mballoc-test.c

   950	
   951	static struct kunit_case mbt_test_cases[] = {
   952		KUNIT_CASE_PARAM(test_new_blocks_simple, mbt_layouts_gen_params),
   953		KUNIT_CASE_PARAM(test_free_blocks_simple, mbt_layouts_gen_params),
   954		KUNIT_CASE_PARAM(test_mb_generate_buddy, mbt_layouts_gen_params),
   955		KUNIT_CASE_PARAM(test_mb_mark_used, mbt_layouts_gen_params),
   956		KUNIT_CASE_PARAM(test_mb_free_blocks, mbt_layouts_gen_params),
   957		KUNIT_CASE_PARAM(test_mark_diskspace_used, mbt_layouts_gen_params),
   958		KUNIT_CASE_PARAM_ATTR(test_mb_mark_used_cost, mbt_layouts_gen_params,
 > 959				      slow_attr),
   960		{}
   961	};
   962	

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