[vbabka-slab:for-6.1/fit_rcu_head 2/2] mm/slab.h:94:1: error: static_assert failed due to requirement '((__builtin_offsetof(struct slab, counters)) & ((unsigned int)(16) - 1)) == 0' "IS_ALIGNED(offsetof(struct slab, counters), 16)"

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

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git for-6.1/fit_rcu_head
head:   2af0ec317dc8f99f0620af23ff6c288bb6f49be5
commit: 2af0ec317dc8f99f0620af23ff6c288bb6f49be5 [2/2] mm/sl[au]b: rearrange struct slab fields to allow larger rcu_head
config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220910/202209101614.lMCcS0Zj-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git/commit/?id=2af0ec317dc8f99f0620af23ff6c288bb6f49be5
        git remote add vbabka-slab git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git
        git fetch --no-tags vbabka-slab for-6.1/fit_rcu_head
        git checkout 2af0ec317dc8f99f0620af23ff6c288bb6f49be5
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from mm/mempool.c:21:
>> mm/slab.h:94:1: error: static_assert failed due to requirement '((__builtin_offsetof(struct slab, counters)) & ((unsigned int)(16) - 1)) == 0' "IS_ALIGNED(offsetof(struct slab, counters), 16)"
   static_assert(IS_ALIGNED(offsetof(struct slab, counters), 16));
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:77:34: note: expanded from macro 'static_assert'
   #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:78:41: note: expanded from macro '__static_assert'
   #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
                                           ^              ~~~~
   1 error generated.


vim +94 mm/slab.h

    90	
    91	#undef SLAB_MATCH
    92	static_assert(sizeof(struct slab) <= sizeof(struct page));
    93	#if defined(CONFIG_HAVE_CMPXCHG_DOUBLE) && defined(CONFIG_SLUB)
  > 94	static_assert(IS_ALIGNED(offsetof(struct slab, counters), 16));
    95	#endif
    96	

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