Re: [PATCH v2 6/6] shmem: add large folios support to the write path

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

Hi Daniel,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on linus/master v6.6-rc2 next-20230920]
[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/Daniel-Gomez/shmem-drop-BLOCKS_PER_PAGE-macro/20230920-005146
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20230919135536.2165715-7-da.gomez%40samsung.com
patch subject: [PATCH v2 6/6] shmem: add large folios support to the write path
config: nios2-allyesconfig (https://download.01.org/0day-ci/archive/20230921/202309210127.kmPiVzus-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230921/202309210127.kmPiVzus-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/202309210127.kmPiVzus-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   In function 'shmem_alloc_and_acct_folio',
       inlined from 'shmem_get_folio_gfp.isra' at mm/shmem.c:2080:11:
>> include/linux/compiler_types.h:425:45: error: call to '__compiletime_assert_359' declared with attribute error: BUILD_BUG failed
     425 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:406:25: note: in definition of macro '__compiletime_assert'
     406 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:425:9: note: in expansion of macro '_compiletime_assert'
     425 |         _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:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
         |                     ^~~~~~~~~~~~~~~~
   include/linux/huge_mm.h:257:28: note: in expansion of macro 'BUILD_BUG'
     257 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; })
         |                            ^~~~~~~~~
   include/linux/huge_mm.h:67:26: note: in expansion of macro 'HPAGE_PMD_SHIFT'
      67 | #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT)
         |                          ^~~~~~~~~~~~~~~
   mm/shmem.c:1734:22: note: in expansion of macro 'HPAGE_PMD_ORDER'
    1734 |         if (order == HPAGE_PMD_ORDER)
         |                      ^~~~~~~~~~~~~~~


vim +/__compiletime_assert_359 +425 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  411  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  412  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  413  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  414  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  415  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  416   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  417   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  418   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  419   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  420   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  421   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  422   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  423   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  424  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @425  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  426  

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