Re: [PATCH v3 2/4] iio: adc: ad4691: add initial driver for AD4691 family

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

Hi Radu,

kernel test robot noticed the following build errors:

[auto build test ERROR on 11439c4635edd669ae435eec308f4ab8a0804808]

url:    https://github.com/intel-lab-lkp/linux/commits/Radu-Sabau-via-B4-Relay/dt-bindings-iio-adc-add-bindings-for-AD4691-family/20260314-040740
base:   11439c4635edd669ae435eec308f4ab8a0804808
patch link:    https://lore.kernel.org/r/20260313-ad4692-multichannel-sar-adc-driver-v3-2-b4d14d81a181%40analog.com
patch subject: [PATCH v3 2/4] iio: adc: ad4691: add initial driver for AD4691 family
config: nios2-allmodconfig (https://download.01.org/0day-ci/archive/20260325/202603252241.8UAUrLG4-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260325/202603252241.8UAUrLG4-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/202603252241.8UAUrLG4-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   drivers/iio/adc/ad4691.c: In function '__ad4691_set_sampling_freq':
>> include/linux/compiler_types.h:706:45: error: call to '__compiletime_assert_418' declared with attribute error: clamp(freq, 1, st->chip->max_rate) signedness error
     706 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:687:25: note: in definition of macro '__compiletime_assert'
     687 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:706:9: note: in expansion of macro '_compiletime_assert'
     706 |         _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:190:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     190 |         BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),                          \
         |         ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:195:9: note: in expansion of macro '__clamp_once'
     195 |         __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
         |         ^~~~~~~~~~~~
   include/linux/minmax.h:206:28: note: in expansion of macro '__careful_clamp'
     206 | #define clamp(val, lo, hi) __careful_clamp(auto, val, lo, hi)
         |                            ^~~~~~~~~~~~~~~
   drivers/iio/adc/ad4691.c:419:16: note: in expansion of macro 'clamp'
     419 |         freq = clamp(freq, 1, st->chip->max_rate);
         |                ^~~~~
--
   In file included from <command-line>:
   ad4691.c: In function '__ad4691_set_sampling_freq':
>> include/linux/compiler_types.h:706:45: error: call to '__compiletime_assert_418' declared with attribute error: clamp(freq, 1, st->chip->max_rate) signedness error
     706 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:687:25: note: in definition of macro '__compiletime_assert'
     687 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:706:9: note: in expansion of macro '_compiletime_assert'
     706 |         _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:190:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     190 |         BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),                          \
         |         ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:195:9: note: in expansion of macro '__clamp_once'
     195 |         __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
         |         ^~~~~~~~~~~~
   include/linux/minmax.h:206:28: note: in expansion of macro '__careful_clamp'
     206 | #define clamp(val, lo, hi) __careful_clamp(auto, val, lo, hi)
         |                            ^~~~~~~~~~~~~~~
   ad4691.c:419:16: note: in expansion of macro 'clamp'
     419 |         freq = clamp(freq, 1, st->chip->max_rate);
         |                ^~~~~


vim +/__compiletime_assert_418 +706 include/linux/compiler_types.h

eb5c2d4b45e3d2d Will Deacon 2020-07-21  692  
eb5c2d4b45e3d2d Will Deacon 2020-07-21  693  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2d Will Deacon 2020-07-21  694  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2d Will Deacon 2020-07-21  695  
eb5c2d4b45e3d2d Will Deacon 2020-07-21  696  /**
eb5c2d4b45e3d2d Will Deacon 2020-07-21  697   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2d Will Deacon 2020-07-21  698   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2d Will Deacon 2020-07-21  699   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2d Will Deacon 2020-07-21  700   *
eb5c2d4b45e3d2d Will Deacon 2020-07-21  701   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2d Will Deacon 2020-07-21  702   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2d Will Deacon 2020-07-21  703   * compiler has support to do so.
eb5c2d4b45e3d2d Will Deacon 2020-07-21  704   */
eb5c2d4b45e3d2d Will Deacon 2020-07-21  705  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2d Will Deacon 2020-07-21 @706  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2d Will Deacon 2020-07-21  707  

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