Re: [CI-ONLY PATCH v2 11/12] PREEMPT_RT injection

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

Hi Maarten,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-tip/drm-tip]
[also build test ERROR on linus/master next-20251212]
[cannot apply to drm-i915/for-linux-next drm-i915/for-linux-next-fixes drm-xe/drm-xe-next v6.18]
[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/Maarten-Lankhorst/drm-i915-display-Fix-intel_lpe_audio_irq_handler-for-PREEMPT-RT/20251213-023952
base:   https://gitlab.freedesktop.org/drm/tip.git drm-tip
patch link:    https://lore.kernel.org/r/20251212143504.973839-25-dev%40lankhorst.se
patch subject: [CI-ONLY PATCH v2 11/12] PREEMPT_RT injection
config: x86_64-buildonly-randconfig-005-20251213 (https://download.01.org/0day-ci/archive/20251213/202512131847.zWdP8WbV-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/20251213/202512131847.zWdP8WbV-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/202512131847.zWdP8WbV-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   In function 'alloc_kmem_cache_cpus',
       inlined from 'do_kmem_cache_create' at mm/slub.c:8625:7:
>> include/linux/compiler_types.h:602:45: error: call to '__compiletime_assert_751' declared with attribute error: BUILD_BUG_ON failed: PERCPU_DYNAMIC_EARLY_SIZE < NR_KMALLOC_TYPES * KMALLOC_SHIFT_HIGH * sizeof(struct kmem_cache_cpu)
     602 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:583:25: note: in definition of macro '__compiletime_assert'
     583 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:602:9: note: in expansion of macro '_compiletime_assert'
     602 |         _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)
         |         ^~~~~~~~~~~~~~~~
   mm/slub.c:7657:9: note: in expansion of macro 'BUILD_BUG_ON'
    7657 |         BUILD_BUG_ON(PERCPU_DYNAMIC_EARLY_SIZE <
         |         ^~~~~~~~~~~~


vim +/__compiletime_assert_751 +602 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  588  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  589  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  590  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  591  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  592  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  593   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  594   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  595   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  596   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  597   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  598   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  599   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  600   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  601  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @602  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  603  

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