include/linux/compiler_types.h:572:38: error: call to '__compiletime_assert_491' declared with attribute error: FIELD_PREP: value too large for the field

include/linux/compiler_types.h:572:38: error: call to '__compiletime_assert_491' declared with attribute error: FIELD_PREP: value too large for the field

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5472d60c129f75282d94ae5ad072ee6dfb7c7246
commit: 32913fe7f71e72fb49033df35ec6388ff7b170ff mips: Add __attribute_const__ to ffs()-family implementations
date:   5 weeks ago
config: mips-randconfig-r133-20251010 (https://download.01.org/0day-ci/archive/20251010/202510102117.Jqxrw1vF-lkp@intel.com/config)
compiler: mips64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251010/202510102117.Jqxrw1vF-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/202510102117.Jqxrw1vF-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   drivers/iio/adc/ti_am335x_adc.c: In function 'tiadc_step_config':
>> include/linux/compiler_types.h:572:38: error: call to '__compiletime_assert_491' declared with attribute error: FIELD_PREP: value too large for the field
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                         ^
   include/linux/compiler_types.h:553:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler_types.h:572:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/bitfield.h:68:3: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ?  \
      ^~~~~~~~~~~~~~~~
   include/linux/bitfield.h:115:3: note: in expansion of macro '__BF_FIELD_CHECK'
      __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
      ^~~~~~~~~~~~~~~~
   include/linux/mfd/ti_am335x_tscadc.h:58:29: note: in expansion of macro 'FIELD_PREP'
    #define STEPCONFIG_AVG(val) FIELD_PREP(GENMASK(4, 2), (val))
                                ^~~~~~~~~~
   drivers/iio/adc/ti_am335x_adc.c:127:17: note: in expansion of macro 'STEPCONFIG_AVG'
       stepconfig = STEPCONFIG_AVG(ffs(adc_dev->step_avg[i]) - 1) |
                    ^~~~~~~~~~~~~~


vim +/__compiletime_assert_491 +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  

:::::: The code at line 572 was first introduced by commit
:::::: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h

:::::: TO: Will Deacon <will@kernel.org>
:::::: CC: Will Deacon <will@kernel.org>

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