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Date: Sat, 25 Nov 2023 23:00:29 +0800
From: kernel test robot <>
To: Kemeng Shi <>,,
Subject: Re: [PATCH 5/5] ext4: Add unit test for ext4_mb_mark_diskspace_used

Hi Kemeng,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tytso-ext4/dev]
[also build test WARNING on linus/master v6.7-rc2 next-20231124]
[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]

base: dev
patch link:
patch subject: [PATCH 5/5] ext4: Add unit test for ext4_mb_mark_diskspace_used
config: i386-buildonly-randconfig-004-20231125 (
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (

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 <>
| Closes:

All warnings (new ones prefixed by >>):

   In file included from fs/ext4/mballoc.c:6996:
   fs/ext4/mballoc-test.c: In function 'test_mark_diskspace_used':
>> fs/ext4/mballoc-test.c:510:23: warning: variable 'max' set but not used [-Wunused-but-set-variable]
     510 |         ext4_grpblk_t max;
         |                       ^~~

vim +/max +510 fs/ext4/mballoc-test.c

   506	static void test_mark_diskspace_used(struct kunit *test)
   507	{
   508		struct super_block *sb = (struct super_block *)test->priv;
   509		struct inode inode = { .i_sb = sb, };
 > 510		ext4_grpblk_t max;
   511		struct ext4_allocation_context ac;
   512		struct test_range ranges[TEST_RANGE_COUNT];
   513		int i;
   515		mbt_generate_test_ranges(sb, ranges, TEST_RANGE_COUNT);
   517		ac.ac_status = AC_STATUS_FOUND;
   518		ac.ac_sb = sb;
   519		ac.ac_inode = &inode;
   520		max = EXT4_CLUSTERS_PER_GROUP(sb);
   521		for (i = 0; i < TEST_RANGE_COUNT; i++)
   522			test_mark_diskspace_used_range(test, &ac, ranges[i].start,
   523						       ranges[i].len);
   524	}

0-DAY CI Kernel Test Service

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