Re: [PATCH v2 19/19] ext4: add first unit test for ext4_mb_new_blocks_simple in mballoc

[kernel test robot]

Hi Kemeng,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tytso-ext4/dev]
[also build test WARNING on next-20230412]
[cannot apply to linus/master v6.3-rc6]
[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-fix-wrong-unit-use-in-ext4_mb_normalize_request/20230412-172757
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
patch link:    https://lore.kernel.org/r/20230412172833.2317696-20-shikemeng%40huaweicloud.com
patch subject: [PATCH v2 19/19] ext4: add first unit test for ext4_mb_new_blocks_simple in mballoc
config: loongarch-randconfig-r004-20230409 (https://download.01.org/0day-ci/archive/20230413/202304130200.eNNpj54h-lkp@xxxxxxxxx/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
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
        # https://github.com/intel-lab-lkp/linux/commit/3ceb1daf83fdf578c28ede1a10e55f05ef7642d5
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Kemeng-Shi/ext4-fix-wrong-unit-use-in-ext4_mb_normalize_request/20230412-172757
        git checkout 3ceb1daf83fdf578c28ede1a10e55f05ef7642d5
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash fs/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202304130200.eNNpj54h-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   fs/ext4/mballoc.c: In function 'ext4_mb_mark_group_bb':
   fs/ext4/mballoc.c:3752:9: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
    3752 |         handle_t *handle = mc->handle;
         |         ^~~~~~~~
   In file included from fs/ext4/mballoc.c:6523:
   fs/ext4/mballoc-test.c: At top level:
>> fs/ext4/mballoc-test.c:153:1: warning: no previous prototype for 'ext4_read_block_bitmap_nowait_stub' [-Wmissing-prototypes]
     153 | ext4_read_block_bitmap_nowait_stub(struct super_block *sb, ext4_group_t block_group,
         | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> fs/ext4/mballoc-test.c:162:5: warning: no previous prototype for 'ext4_wait_block_bitmap_stub' [-Wmissing-prototypes]
     162 | int ext4_wait_block_bitmap_stub(struct super_block *sb,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> fs/ext4/mballoc-test.c:169:25: warning: no previous prototype for 'ext4_get_group_desc_stub' [-Wmissing-prototypes]
     169 | struct ext4_group_desc *ext4_get_group_desc_stub(struct super_block *sb,
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~
>> fs/ext4/mballoc-test.c:181:5: warning: no previous prototype for 'ext4_mb_mark_group_bb_stub' [-Wmissing-prototypes]
     181 | int ext4_mb_mark_group_bb_stub(struct ext4_mark_context *mc,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/ext4_read_block_bitmap_nowait_stub +153 fs/ext4/mballoc-test.c

   151	
   152	struct buffer_head *
 > 153	ext4_read_block_bitmap_nowait_stub(struct super_block *sb, ext4_group_t block_group,
   154					   bool ignore_locked)
   155	{
   156		struct mb_grp_ctx *grp_ctx = MB_GRP_CTX(sb, block_group);
   157	
   158		get_bh(&grp_ctx->bitmap_bh);
   159		return &grp_ctx->bitmap_bh;
   160	}
   161	
 > 162	int ext4_wait_block_bitmap_stub(struct super_block *sb,
   163					ext4_group_t block_group,
   164					struct buffer_head *bh)
   165	{
   166		return 0;
   167	}
   168	
 > 169	struct ext4_group_desc *ext4_get_group_desc_stub(struct super_block *sb,
   170						     ext4_group_t block_group,
   171						     struct buffer_head **bh)
   172	{
   173		struct mb_grp_ctx *grp_ctx = MB_GRP_CTX(sb, block_group);
   174	
   175		if (bh != NULL)
   176			*bh = &grp_ctx->gd_bh;
   177	
   178		return &grp_ctx->desc;
   179	}
   180	
 > 181	int ext4_mb_mark_group_bb_stub(struct ext4_mark_context *mc,
   182				       ext4_group_t group, ext4_grpblk_t blkoff,
   183				       ext4_grpblk_t len, int flags)
   184	{
   185		struct mb_grp_ctx *grp_ctx = MB_GRP_CTX(mc->sb, group);
   186		struct buffer_head *bitmap_bh = &grp_ctx->bitmap_bh;
   187	
   188		if (mc->state)
   189			mb_set_bits(bitmap_bh->b_data, blkoff, len);
   190		else
   191			mb_clear_bits(bitmap_bh->b_data, blkoff, len);
   192	
   193		return 0;
   194	}
   195	

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https://github.com/intel/lkp-tests