linux-kernel - [peterz-queue:locking/core 6/7] kernel/locking/lockdep.c:6017:57: error: 'offset' undeclared; did you mean 'off

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Date:   Sat, 12 Feb 2022 13:24:42 +0800
From:   kernel test robot <lkp@...el.com>
To:     Waiman Long <longman@...hat.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>
Subject: [peterz-queue:locking/core 6/7] kernel/locking/lockdep.c:6017:57:
 error: 'offset' undeclared; did you mean 'off_t'?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/core
head:   2300c94a775d0f2a733ef11285cc0abe8126edf6
commit: 065af96d73df2653a2d7da572cf8ba57218479ef [6/7] locking/lockdep: Cleanup reinit_class()
config: i386-randconfig-m021 (https://download.01.org/0day-ci/archive/20220212/202202121348.Uty03Al8-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=065af96d73df2653a2d7da572cf8ba57218479ef
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue locking/core
        git checkout 065af96d73df2653a2d7da572cf8ba57218479ef
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   kernel/locking/lockdep.c: In function 'reinit_class':
>> kernel/locking/lockdep.c:6017:57: error: 'offset' undeclared (first use in this function); did you mean 'off_t'?
    6017 |  BUILD_BUG_ON(offsetof(struct lock_class, lock_entry) > offset);
         |                                                         ^~~~~~
   include/linux/compiler_types.h:326:9: note: in definition of macro '__compiletime_assert'
     326 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:346:2: note: in expansion of macro '_compiletime_assert'
     346 |  _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:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      50 |  BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |  ^~~~~~~~~~~~~~~~
   kernel/locking/lockdep.c:6017:2: note: in expansion of macro 'BUILD_BUG_ON'
    6017 |  BUILD_BUG_ON(offsetof(struct lock_class, lock_entry) > offset);
         |  ^~~~~~~~~~~~
   kernel/locking/lockdep.c:6017:57: note: each undeclared identifier is reported only once for each function it appears in
    6017 |  BUILD_BUG_ON(offsetof(struct lock_class, lock_entry) > offset);
         |                                                         ^~~~~~
   include/linux/compiler_types.h:326:9: note: in definition of macro '__compiletime_assert'
     326 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:346:2: note: in expansion of macro '_compiletime_assert'
     346 |  _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:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      50 |  BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |  ^~~~~~~~~~~~~~~~
   kernel/locking/lockdep.c:6017:2: note: in expansion of macro 'BUILD_BUG_ON'
    6017 |  BUILD_BUG_ON(offsetof(struct lock_class, lock_entry) > offset);
         |  ^~~~~~~~~~~~


vim +6017 kernel/locking/lockdep.c

  6011	
  6012	static void reinit_class(struct lock_class *class)
  6013	{
  6014		WARN_ON_ONCE(!class->lock_entry.next);
  6015		WARN_ON_ONCE(!list_empty(&class->locks_after));
  6016		WARN_ON_ONCE(!list_empty(&class->locks_before));
> 6017		BUILD_BUG_ON(offsetof(struct lock_class, lock_entry) > offset);
  6018		BUILD_BUG_ON(offsetof(struct lock_class, locks_after) > offset);
  6019		BUILD_BUG_ON(offsetof(struct lock_class, locks_before) > offset);
  6020		memset_startat(class, 0, key);
  6021	}
  6022	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org