[thomas-weissschuh:b4/cros_ec-hwmon-overflow 4/4] drivers/hwmon/cros_ec_hwmon.c:163:3: error: call to '__compiletime_assert_341' declared with 'error' attribute: BUILD_BUG_ON failed: sizeof(long) == 8

:::::: 
:::::: Manual check reason: "__compiletime_assert_NNN"
:::::: 

BCC: [email protected]
CC: [email protected]
CC: [email protected]
TO: "Thomas Weißschuh" <[email protected]>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/cros_ec-hwmon-overflow
head:   f509e4c5cf112ac16f4d049c2ef6eb6dfdb6e6ad
commit: f509e4c5cf112ac16f4d049c2ef6eb6dfdb6e6ad [4/4] x
:::::: branch date: 6 hours ago
:::::: commit date: 6 hours ago
config: sparc64-allmodconfig (https://download.01.org/0day-ci/archive/20260703/[email protected]/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260703/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/r/[email protected]/

All errors (new ones prefixed by >>):

>> drivers/hwmon/cros_ec_hwmon.c:163:3: error: call to '__compiletime_assert_341' declared with 'error' attribute: BUILD_BUG_ON failed: sizeof(long) == 8
     163 |                 BUILD_BUG_ON(sizeof(long) == 8);
         |                 ^
   include/linux/build_bug.h:51:2: note: expanded from macro 'BUILD_BUG_ON'
      51 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^
   include/linux/build_bug.h:40:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
      40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^
   include/linux/compiler_types.h:702:2: note: expanded from macro 'compiletime_assert'
     702 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^
   include/linux/compiler_types.h:690:2: note: expanded from macro '_compiletime_assert'
     690 |         __compiletime_assert(condition, msg, prefix, suffix)
         |         ^
   include/linux/compiler_types.h:683:4: note: expanded from macro '__compiletime_assert'
     683 |                         prefix ## suffix();                             \
         |                         ^
   <scratch space>:73:1: note: expanded from here
      73 | __compiletime_assert_341
         | ^
   drivers/hwmon/cros_ec_hwmon.c:158:3: error: call to '__compiletime_assert_340' declared with 'error' attribute: BUILD_BUG_ON failed: sizeof(long) == 8
     158 |                 BUILD_BUG_ON(sizeof(long) == 8);
         |                 ^
   include/linux/build_bug.h:51:2: note: expanded from macro 'BUILD_BUG_ON'
      51 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^
   include/linux/build_bug.h:40:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
      40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^
   include/linux/compiler_types.h:702:2: note: expanded from macro 'compiletime_assert'
     702 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^
   include/linux/compiler_types.h:690:2: note: expanded from macro '_compiletime_assert'
     690 |         __compiletime_assert(condition, msg, prefix, suffix)
         |         ^
   include/linux/compiler_types.h:683:4: note: expanded from macro '__compiletime_assert'
     683 |                         prefix ## suffix();                             \
         |                         ^
   <scratch space>:69:1: note: expanded from here
      69 | __compiletime_assert_340
         | ^
   2 errors generated.


vim +163 drivers/hwmon/cros_ec_hwmon.c

a810e1aa11bf6f Thomas Weißschuh 2026-06-30  154  
a8d51fb8a1ad25 Thomas Weißschuh 2026-06-15  155  static bool cros_ec_hwmon_kelvin_to_millicelsius_overflow(long t, long *ret)
a810e1aa11bf6f Thomas Weißschuh 2026-06-30  156  {
f509e4c5cf112a Thomas Weißschuh 2026-07-03  157  	if (check_mul_overflow(t, MILLIDEGREE_PER_DEGREE, ret)) {
f509e4c5cf112a Thomas Weißschuh 2026-07-03  158  		BUILD_BUG_ON(sizeof(long) == 8);
a8d51fb8a1ad25 Thomas Weißschuh 2026-06-15  159  		return true;
f509e4c5cf112a Thomas Weißschuh 2026-07-03  160  	}
a8d51fb8a1ad25 Thomas Weißschuh 2026-06-15  161  
f509e4c5cf112a Thomas Weißschuh 2026-07-03  162  	if (check_add_overflow(*ret, CROS_EC_HWMON_ABSOLUTE_ZERO_MILLICELSIUS, ret)) {
f509e4c5cf112a Thomas Weißschuh 2026-07-03 @163  		BUILD_BUG_ON(sizeof(long) == 8);
a8d51fb8a1ad25 Thomas Weißschuh 2026-06-15  164  		return true;
f509e4c5cf112a Thomas Weißschuh 2026-07-03  165  	}
a8d51fb8a1ad25 Thomas Weißschuh 2026-06-15  166  
a8d51fb8a1ad25 Thomas Weißschuh 2026-06-15  167  	return false;
a810e1aa11bf6f Thomas Weißschuh 2026-06-30  168  }
a810e1aa11bf6f Thomas Weißschuh 2026-06-30  169  

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki