Re: [PATCH] pidfds: add coredump_code field to pidfd_info

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

Hi Emanuele,

kernel test robot noticed the following build errors:

[auto build test ERROR on shuah-kselftest/next]
[also build test ERROR on shuah-kselftest/fixes brauner-vfs/vfs.all linus/master v7.0-rc4 next-20260320]
[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/Emanuele-Rocca/pidfds-add-coredump_code-field-to-pidfd_info/20260321-125434
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
patch link:    https://lore.kernel.org/r/ab29J6KsQm8Xg3LR%40NH27D9T0LF
patch subject: [PATCH] pidfds: add coredump_code field to pidfd_info
config: i386-allnoconfig (https://download.01.org/0day-ci/archive/20260321/202603211842.JCwUVYTI-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260321/202603211842.JCwUVYTI-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/202603211842.JCwUVYTI-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   In function 'pidfd_info',
       inlined from 'pidfd_ioctl' at fs/pidfs.c:527:10:
>> include/linux/compiler_types.h:706:45: error: call to '__compiletime_assert_410' declared with attribute error: BUILD_BUG_ON failed: sizeof(struct pidfd_info) != PIDFD_INFO_SIZE_VER3
     706 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:687:25: note: in definition of macro '__compiletime_assert'
     687 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:706:9: note: in expansion of macro '_compiletime_assert'
     706 |         _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/pidfs.c:350:9: note: in expansion of macro 'BUILD_BUG_ON'
     350 |         BUILD_BUG_ON(sizeof(struct pidfd_info) != PIDFD_INFO_SIZE_VER3);
         |         ^~~~~~~~~~~~


vim +/__compiletime_assert_410 +706 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  692  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  693  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  694  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  695  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  696  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  697   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  698   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  699   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  700   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  701   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  702   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  703   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  704   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  705  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @706  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  707  

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