Re: [PATCH v2] mtd: block2mtd: Fix divide error when erase_size is zero

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

:::::: 
:::::: Manual check reason: "linux-review patch is more than 7 days old, verify it wasn't already superseded"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <48230456575d27aa83ce8640de8fc07cc62e8efb.1786499433.git.xiaopei01@kylinos.cn>
References: <48230456575d27aa83ce8640de8fc07cc62e8efb.1786499433.git.xiaopei01@kylinos.cn>
TO: Pei Xiao <xiaopei01@kylinos.cn>
TO: joern@lazybastard.org
TO: miquel.raynal@bootlin.com
TO: richard@nod.at
TO: vigneshr@ti.com
TO: linux-mtd@lists.infradead.org
TO: linux-kernel@vger.kernel.org
CC: Pei Xiao <xiaopei01@kylinos.cn>
CC: syzbot+b320a4d5f65a61dbbf89@syzkaller.appspotmail.com
CC: "Jörn Engel" <joern@barelysecure.org>
CC: stable@vger.kernel.org

Hi Pei,

kernel test robot noticed the following build errors:

[auto build test ERROR on mtd/mtd/next]
[also build test ERROR on mtd/mtd/fixes linus/master v7.2 next-20260819]
[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/Pei-Xiao/mtd-block2mtd-Fix-divide-error-when-erase_size-is-zero/20260812-095242
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next
patch link:    https://lore.kernel.org/r/48230456575d27aa83ce8640de8fc07cc62e8efb.1786499433.git.xiaopei01%40kylinos.cn
patch subject: [PATCH v2] mtd: block2mtd: Fix divide error when erase_size is zero
:::::: branch date: 22 hours ago
:::::: commit date: 22 hours ago
config: sh-randconfig-002-20260821 (https://download.01.org/0day-ci/archive/20260821/202608211251.8RIgwpgB-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 13.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260821/202608211251.8RIgwpgB-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/r/202608211251.8RIgwpgB-lkp@intel.com/

All errors (new ones prefixed by >>):

   sh4-linux-ld: drivers/mtd/devices/block2mtd.o: in function `block2mtd_free_device':
>> drivers/mtd/devices/block2mtd.c:215:(.text+0x670): undefined reference to `__moddi3'


vim +215 drivers/mtd/devices/block2mtd.c

^1da177e4c3f41 Linus Torvalds    2005-04-16  201  
^1da177e4c3f41 Linus Torvalds    2005-04-16  202  
^1da177e4c3f41 Linus Torvalds    2005-04-16  203  static void block2mtd_free_device(struct block2mtd_dev *dev)
^1da177e4c3f41 Linus Torvalds    2005-04-16  204  {
^1da177e4c3f41 Linus Torvalds    2005-04-16  205  	if (!dev)
^1da177e4c3f41 Linus Torvalds    2005-04-16  206  		return;
^1da177e4c3f41 Linus Torvalds    2005-04-16  207  
^1da177e4c3f41 Linus Torvalds    2005-04-16  208  	kfree(dev->mtd.name);
^1da177e4c3f41 Linus Torvalds    2005-04-16  209  
f9d8c3c4236ef2 Christian Brauner 2024-01-23  210  	if (dev->bdev_file) {
f9d8c3c4236ef2 Christian Brauner 2024-01-23  211  		invalidate_mapping_pages(dev->bdev_file->f_mapping, 0, -1);
22650a99821dda Christian Brauner 2024-03-26  212  		bdev_fput(dev->bdev_file);
^1da177e4c3f41 Linus Torvalds    2005-04-16  213  	}
^1da177e4c3f41 Linus Torvalds    2005-04-16  214  
^1da177e4c3f41 Linus Torvalds    2005-04-16 @215  	kfree(dev);
^1da177e4c3f41 Linus Torvalds    2005-04-16  216  }
^1da177e4c3f41 Linus Torvalds    2005-04-16  217  

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