[android-common:android16-6.12-2026-09 8/8] include/linux/compiler_types.h:557:45: error: call to '__compiletime_assert_527' declared with attribute error: BUILD_BUG_ON failed: sizeof(struct z_erofs_map_header) != 8

[android-common:android16-6.12-2026-09 8/8] include/linux/compiler_types.h:557:45: error: call to '__compiletime_assert_527' declared with attribute error: BUILD_BUG_ON failed: sizeof(struct z_erofs_map_header) != 8

[kernel test robot]

tree:   https://android.googlesource.com/kernel/common android16-6.12-2026-09
head:   7cc7455426123221ba503e4251c3e829baf3a56c
commit: fba340769f186c3e8448148a5524c8f34daeb468 [8/8] erofs: add encoded extent on-disk definition
config: arm-randconfig-2000-20261112 (https://download.01.org/0day-ci/archive/20261112/202611120456.w89UAMqR-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261112/202611120456.w89UAMqR-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/202611120456.w89UAMqR-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   In function 'erofs_check_ondisk_layout_definitions',
       inlined from 'erofs_module_init' at fs/erofs/super.c:934:2:
>> include/linux/compiler_types.h:557:45: error: call to '__compiletime_assert_527' declared with attribute error: BUILD_BUG_ON failed: sizeof(struct z_erofs_map_header) != 8
     557 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:538:25: note: in definition of macro '__compiletime_assert'
     538 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:557:9: note: in expansion of macro '_compiletime_assert'
     557 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^~~~~~~~~~~~~~~~
   fs/erofs/erofs_fs.h:449:9: note: in expansion of macro 'BUILD_BUG_ON'
     449 |         BUILD_BUG_ON(sizeof(struct z_erofs_map_header) != 8);
         |         ^~~~~~~~~~~~


vim +/__compiletime_assert_527 +557 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  543  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  544  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  545  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  546  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  547  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  548   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  549   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  550   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  551   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  552   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  553   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  554   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  555   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  556  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @557  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  558  

:::::: The code at line 557 was first introduced by commit
:::::: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h

:::::: TO: Will Deacon <will@kernel.org>
:::::: CC: Will Deacon <will@kernel.org>

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