[linux-next:master 3548/6771] ./usr/include/linux/vbox_vmmdev_types.h:254:6: error: field u within 'struct vmmdev_hgcm_function_parameter64::(anonymous union)::(unnamed at ./usr/include/linux/vbox_vmmdev_types.h:249:3)' is less aligned than 'union (unnamed union at ./usr/include/linux...

[linux-next:master 3548/6771] ./usr/include/linux/vbox_vmmdev_types.h:254:6: error: field u within 'struct vmmdev_hgcm_function_parameter64::(anonymous union)::(unnamed at ./usr/include/linux/vbox_vmmdev_types.h:249:3)' is less aligned than 'union (unnamed union at ./usr/include/linux...

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   9b7977f9e39b7768c70c2aa497f04e7569fd3e00
commit: e3970d77ec504e54c3f91a48b2125775c16ba4c0 [3548/6771] kbuild: uapi: drop dependency on CC_CAN_LINK
config: arm-randconfig-r064-20260115 (https://download.01.org/0day-ci/archive/20260115/202601152258.8RPQcl59-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260115/202601152258.8RPQcl59-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/202601152258.8RPQcl59-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <built-in>:1:
   ./usr/include/linux/vbox_vmmdev_types.h:239:4: error: field u within 'struct vmmdev_hgcm_function_parameter32' is less aligned than 'union (unnamed union at ./usr/include/linux/vbox_vmmdev_types.h:223:2)' and is usually due to 'struct vmmdev_hgcm_function_parameter32' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
     239 |         } u;
         |           ^
>> ./usr/include/linux/vbox_vmmdev_types.h:254:6: error: field u within 'struct vmmdev_hgcm_function_parameter64::(anonymous union)::(unnamed at ./usr/include/linux/vbox_vmmdev_types.h:249:3)' is less aligned than 'union (unnamed union at ./usr/include/linux/vbox_vmmdev_types.h:251:4)' and is usually due to 'struct vmmdev_hgcm_function_parameter64::(anonymous union)::(unnamed at ./usr/include/linux/vbox_vmmdev_types.h:249:3)' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
     254 |                         } u;
         |                           ^
   2 errors generated.
--
   In file included from <built-in>:1:
   In file included from ./usr/include/linux/vboxguest.h:14:
   usr/include/linux/vbox_vmmdev_types.h:239:4: error: field u within 'struct vmmdev_hgcm_function_parameter32' is less aligned than 'union (unnamed union at usr/include/linux/vbox_vmmdev_types.h:223:2)' and is usually due to 'struct vmmdev_hgcm_function_parameter32' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
     239 |         } u;
         |           ^
>> usr/include/linux/vbox_vmmdev_types.h:254:6: error: field u within 'struct vmmdev_hgcm_function_parameter64::(anonymous union)::(unnamed at usr/include/linux/vbox_vmmdev_types.h:249:3)' is less aligned than 'union (unnamed union at usr/include/linux/vbox_vmmdev_types.h:251:4)' and is usually due to 'struct vmmdev_hgcm_function_parameter64::(anonymous union)::(unnamed at usr/include/linux/vbox_vmmdev_types.h:249:3)' being packed, which can lead to unaligned accesses [-Werror,-Wunaligned-access]
     254 |                         } u;
         |                           ^
   2 errors generated.

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