Re: [v3 10/11] gpu/drm/nouveau: add THP migration support

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

Hi Balbir,

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/Balbir-Singh/mm-zone_device-support-large-zone-device-private-folios/20250812-105145
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20250812024036.690064-11-balbirs%40nvidia.com
patch subject: [v3 10/11] gpu/drm/nouveau: add THP migration support
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20250813/202508130923.0VGA41Zv-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250813/202508130923.0VGA41Zv-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/202508130923.0VGA41Zv-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   drivers/gpu/drm/nouveau/nouveau_dmem.c: In function 'nouveau_dmem_migrate_vma':
>> include/linux/compiler_types.h:572:45: error: call to '__compiletime_assert_706' declared with attribute error: max((1<<((16 + __pte_index_size)-16)), max) signedness error
     572 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:553:25: note: in definition of macro '__compiletime_assert'
     553 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:572:9: note: in expansion of macro '_compiletime_assert'
     572 |         _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/minmax.h:93:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      93 |         BUILD_BUG_ON_MSG(!__types_ok(ux, uy),           \
         |         ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:98:9: note: in expansion of macro '__careful_cmp_once'
      98 |         __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
         |         ^~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:112:25: note: in expansion of macro '__careful_cmp'
     112 | #define max(x, y)       __careful_cmp(max, x, y)
         |                         ^~~~~~~~~~~~~
   drivers/gpu/drm/nouveau/nouveau_dmem.c:811:23: note: in expansion of macro 'max'
     811 |                 max = max(HPAGE_PMD_NR, max);
         |                       ^~~
--
   In file included from <command-line>:
   nouveau/nouveau_dmem.c: In function 'nouveau_dmem_migrate_vma':
>> include/linux/compiler_types.h:572:45: error: call to '__compiletime_assert_706' declared with attribute error: max((1<<((16 + __pte_index_size)-16)), max) signedness error
     572 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:553:25: note: in definition of macro '__compiletime_assert'
     553 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:572:9: note: in expansion of macro '_compiletime_assert'
     572 |         _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/minmax.h:93:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      93 |         BUILD_BUG_ON_MSG(!__types_ok(ux, uy),           \
         |         ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:98:9: note: in expansion of macro '__careful_cmp_once'
      98 |         __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
         |         ^~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:112:25: note: in expansion of macro '__careful_cmp'
     112 | #define max(x, y)       __careful_cmp(max, x, y)
         |                         ^~~~~~~~~~~~~
   nouveau/nouveau_dmem.c:811:23: note: in expansion of macro 'max'
     811 |                 max = max(HPAGE_PMD_NR, max);
         |                       ^~~


vim +/__compiletime_assert_706 +572 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  558  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  559  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  560  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  561  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  562  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  563   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  564   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  565   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  566   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  567   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  568   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  569   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  570   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  571  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @572  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  573  

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