Re: [PATCH 06/12] mm, swap: implement helpers for reserving data in the swap table

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

Hi Kairui,

kernel test robot noticed the following build errors:

[auto build test ERROR on 10de4550639e9df9242e32e9affc90ed75a27c7d]

url:    https://github.com/intel-lab-lkp/linux/commits/Kairui-Song/mm-swap-protect-si-swap_file-properly-and-use-as-a-mount-indicator/20260126-020149
base:   10de4550639e9df9242e32e9affc90ed75a27c7d
patch link:    https://lore.kernel.org/r/20260126-swap-table-p3-v1-6-a74155fab9b0%40tencent.com
patch subject: [PATCH 06/12] mm, swap: implement helpers for reserving data in the swap table
config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20260126/202601261555.3oBvFZIt-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260126/202601261555.3oBvFZIt-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/202601261555.3oBvFZIt-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   In function 'pfn_to_swp_tb',
       inlined from 'folio_to_swp_tb' at mm/swap_table.h:115:9,
       inlined from '__swap_cache_add_folio' at mm/swap_state.c:151:11:
>> include/linux/compiler_types.h:631:45: error: call to '__compiletime_assert_601' declared with attribute error: BUILD_BUG_ON failed: SWAP_CACHE_PFN_BITS > (BITS_PER_LONG - SWP_TB_PFN_MARK_BITS - SWP_TB_COUNT_BITS)
     631 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:612:25: note: in definition of macro '__compiletime_assert'
     612 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:631:9: note: in expansion of macro '_compiletime_assert'
     631 |         _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/swap_table.h:104:9: note: in expansion of macro 'BUILD_BUG_ON'
     104 |         BUILD_BUG_ON(SWAP_CACHE_PFN_BITS >
         |         ^~~~~~~~~~~~
   In function 'pfn_to_swp_tb',
       inlined from 'folio_to_swp_tb' at mm/swap_table.h:115:9,
       inlined from '__swap_cache_replace_folio' at mm/swap_state.c:334:11:
>> include/linux/compiler_types.h:631:45: error: call to '__compiletime_assert_601' declared with attribute error: BUILD_BUG_ON failed: SWAP_CACHE_PFN_BITS > (BITS_PER_LONG - SWP_TB_PFN_MARK_BITS - SWP_TB_COUNT_BITS)
     631 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:612:25: note: in definition of macro '__compiletime_assert'
     612 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:631:9: note: in expansion of macro '_compiletime_assert'
     631 |         _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/swap_table.h:104:9: note: in expansion of macro 'BUILD_BUG_ON'
     104 |         BUILD_BUG_ON(SWAP_CACHE_PFN_BITS >
         |         ^~~~~~~~~~~~


vim +/__compiletime_assert_601 +631 include/linux/compiler_types.h

eb5c2d4b45e3d2d Will Deacon 2020-07-21  617  
eb5c2d4b45e3d2d Will Deacon 2020-07-21  618  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2d Will Deacon 2020-07-21  619  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2d Will Deacon 2020-07-21  620  
eb5c2d4b45e3d2d Will Deacon 2020-07-21  621  /**
eb5c2d4b45e3d2d Will Deacon 2020-07-21  622   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2d Will Deacon 2020-07-21  623   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2d Will Deacon 2020-07-21  624   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2d Will Deacon 2020-07-21  625   *
eb5c2d4b45e3d2d Will Deacon 2020-07-21  626   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2d Will Deacon 2020-07-21  627   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2d Will Deacon 2020-07-21  628   * compiler has support to do so.
eb5c2d4b45e3d2d Will Deacon 2020-07-21  629   */
eb5c2d4b45e3d2d Will Deacon 2020-07-21  630  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2d Will Deacon 2020-07-21 @631  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2d Will Deacon 2020-07-21  632  

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