Re: [PATCH] mm: Fix vmstat after removing NR_BOUNCE

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

Hi Kirill,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Kirill-A-Shutemov/mm-Fix-vmstat-after-removing-NR_BOUNCE/20250529-184044
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20250529103832.2937460-1-kirill.shutemov%40linux.intel.com
patch subject: [PATCH] mm: Fix vmstat after removing NR_BOUNCE
config: m68k-allnoconfig (https://download.01.org/0day-ci/archive/20250529/202505291930.NDyeQ06g-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250529/202505291930.NDyeQ06g-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/202505291930.NDyeQ06g-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   mm/vmstat.c: In function 'vmstat_start':
>> include/linux/compiler_types.h:563:45: error: call to '__compiletime_assert_318' declared with attribute error: BUILD_BUG_ON failed: ARRAY_SIZE(vmstat_text) < NR_VMSTAT_ITEMS
     563 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:544:25: note: in definition of macro '__compiletime_assert'
     544 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:563:9: note: in expansion of macro '_compiletime_assert'
     563 |         _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/vmstat.c:1872:9: note: in expansion of macro 'BUILD_BUG_ON'
    1872 |         BUILD_BUG_ON(ARRAY_SIZE(vmstat_text) < NR_VMSTAT_ITEMS);
         |         ^~~~~~~~~~~~


vim +/__compiletime_assert_318 +563 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  549  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  550  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  551  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  552  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  553  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  554   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  555   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  556   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  557   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  558   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  559   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  560   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  561   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  562  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @563  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  564  

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