include/linux/compiler_types.h:542:45: error: call to '__compiletime_assert_413' declared with attribute error: clamp() low limit source_min greater than high limit source_max
From: kernel test robot
Date: Sun Feb 02 2025 - 00:52:09 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: a86bf2283d2c9769205407e2b54777c03d012939
commit: a5743f32baec4728711bbc01d6ac2b33d4c67040 minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
date: 8 days ago
config: parisc-allmodconfig (https://download.01.org/0day-ci/archive/20250202/202502021352.Sidg3EVM-lkp@xxxxxxxxx/config)
compiler: hppa-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250202/202502021352.Sidg3EVM-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202502021352.Sidg3EVM-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
In file included from <command-line>:
drivers/gpu/drm/i915/display/intel_backlight.c: In function 'scale':
>> include/linux/compiler_types.h:542:45: error: call to '__compiletime_assert_413' declared with attribute error: clamp() low limit source_min greater than high limit source_max
542 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:523:25: note: in definition of macro '__compiletime_assert'
523 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:542:9: note: in expansion of macro '_compiletime_assert'
542 | _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:109:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
109 | BUILD_BUG_ON_MSG(statically_true(ulo > uhi), \
| ^~~~~~~~~~~~~~~~
include/linux/minmax.h:116:9: note: in expansion of macro '__clamp_once'
116 | __clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
| ^~~~~~~~~~~~
include/linux/minmax.h:192:28: note: in expansion of macro '__careful_clamp'
192 | #define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
| ^~~~~~~~~~~~~~~
drivers/gpu/drm/i915/display/intel_backlight.c:47:22: note: in expansion of macro 'clamp'
47 | source_val = clamp(source_val, source_min, source_max);
| ^~~~~
vim +/__compiletime_assert_413 +542 include/linux/compiler_types.h
eb5c2d4b45e3d2 Will Deacon 2020-07-21 528
eb5c2d4b45e3d2 Will Deacon 2020-07-21 529 #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 530 __compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21 531
eb5c2d4b45e3d2 Will Deacon 2020-07-21 532 /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21 533 * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21 534 * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21 535 * @msg: a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21 536 *
eb5c2d4b45e3d2 Will Deacon 2020-07-21 537 * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21 538 * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21 539 * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21 540 */
eb5c2d4b45e3d2 Will Deacon 2020-07-21 541 #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @542 _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21 543
:::::: The code at line 542 was first introduced by commit
:::::: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h
:::::: TO: Will Deacon <will@xxxxxxxxxx>
:::::: CC: Will Deacon <will@xxxxxxxxxx>
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