Re: [PATCH v13 08/11] ext4: dirdata feature

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

Hi Artem,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 8c4f6e3376348fc3162eed86a05b933921c8f9ed]

url:    https://github.com/intel-lab-lkp/linux/commits/Artem-Blagodarenko/ext4-validate-count-against-limit-in-ext4_dx_csum_verify-_set/20261029-122400
base:   8c4f6e3376348fc3162eed86a05b933921c8f9ed
patch link:    https://lore.kernel.org/r/20261029122413.230409-9-ablagodarenko%40thelustrecollective.com
patch subject: [PATCH v13 08/11] ext4: dirdata feature
config: arm-randconfig-1000-20261030 (https://download.01.org/0day-ci/archive/20261030/202610301711.NaWjQ2jw-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261030/202610301711.NaWjQ2jw-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/oe-kbuild-all/202610301711.NaWjQ2jw-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/ext4/namei.c:39:
>> fs/ext4/ext4.h:2634:29: warning: field dh_hash within 'struct ext4_dirent_hash' is less aligned than 'struct ext4_dir_entry_hash' and is usually due to 'struct ext4_dirent_hash' being packed, which can lead to unaligned accesses [-Wunaligned-access]
    2634 |         struct ext4_dir_entry_hash      dh_hash;
         |                                         ^
   1 warning generated.


vim +2634 fs/ext4/ext4.h

ca153a95a4cb6a fs/ext4/ext4.h          Artem Blagodarenko 2026-10-29  2631  
ca153a95a4cb6a fs/ext4/ext4.h          Artem Blagodarenko 2026-10-29  2632  struct ext4_dirent_hash {
ca153a95a4cb6a fs/ext4/ext4.h          Artem Blagodarenko 2026-10-29  2633  	struct ext4_dirent_data_header	dh_header;
ca153a95a4cb6a fs/ext4/ext4.h          Artem Blagodarenko 2026-10-29 @2634  	struct ext4_dir_entry_hash	dh_hash;
ca153a95a4cb6a fs/ext4/ext4.h          Artem Blagodarenko 2026-10-29  2635  } __packed;
ac27a0ec112a08 include/linux/ext4_fs.h Dave Kleikamp      2006-10-11  2636  

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