From: kernel test robot <lkp@intel.com>
To: Thomas Zimmermann <tzimmermann@suse.de>
Cc: oe-kbuild-all@lists.linux.dev, Lee Jones <lee@kernel.org>,
"Daniel Thompson (RISCstar)" <danielt@kernel.org>,
Simona Vetter <simona.vetter@ffwll.ch>
Subject: [lee-backlight:for-backlight-next 1/4] include/linux/math.h:162:17: error: first argument to '__builtin_choose_expr' not a constant
Date: Fri, 14 Nov 2025 03:04:56 +0800 [thread overview]
Message-ID: <202511140227.xzHsIPcb-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight.git for-backlight-next
head: 67d8eed26eadb1edd4873d24889be26aa9b73fe5
commit: 243ce64b2b371cdf2cbc39c9422cb3047cab6de7 [1/4] backlight: Do not include <linux/fb.h> in header file
config: powerpc-ppc6xx_defconfig (https://download.01.org/0day-ci/archive/20251114/202511140227.xzHsIPcb-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251114/202511140227.xzHsIPcb-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/202511140227.xzHsIPcb-lkp@intel.com/
All errors (new ones prefixed by >>):
| ^~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:84:22: note: in expansion of macro '___PASTE'
84 | #define __PASTE(a,b) ___PASTE(a,b)
| ^~~~~~~~
include/linux/compiler.h:166:29: note: in expansion of macro '__PASTE'
166 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
| ^~~~~~~
include/linux/compiler_types.h:84:22: note: in expansion of macro '___PASTE'
84 | #define __PASTE(a,b) ___PASTE(a,b)
| ^~~~~~~~
include/linux/compiler.h:166:37: note: in expansion of macro '__PASTE'
166 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
| ^~~~~~~
include/linux/minmax.h:98:38: note: in expansion of macro '__UNIQUE_ID'
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/macintosh/via-pmu-backlight.c:45:23: note: in expansion of macro 'max'
45 | max = max((int)bl_curve[i], max);
| ^~~
include/linux/minmax.h:71:17: error: first argument to '__builtin_choose_expr' not a constant
71 | (typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L)))(ux) >= 0)
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:577:23: note: in definition of macro '__compiletime_assert'
577 | if (!(condition)) \
| ^~~~~~~~~
include/linux/compiler_types.h:597:9: note: in expansion of macro '_compiletime_assert'
597 | _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:70:25: note: in expansion of macro 'statically_true'
70 | #define __is_nonneg(ux) statically_true( \
| ^~~~~~~~~~~~~~~
include/linux/minmax.h:50:14: note: in expansion of macro '__is_nonneg'
50 | (2 + __is_nonneg(ux)) : (1 + 2 * (sizeof(ux) < 4)))
| ^~~~~~~~~~~
include/linux/minmax.h:75:10: note: in expansion of macro '__sign_use'
75 | (__sign_use(ux) & __sign_use(uy))
| ^~~~~~~~~~
include/linux/minmax.h:93:27: note: in expansion of macro '__types_ok'
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/macintosh/via-pmu-backlight.c:45:23: note: in expansion of macro 'max'
45 | max = max((int)bl_curve[i], max);
| ^~~
include/linux/minmax.h:71:17: error: first argument to '__builtin_choose_expr' not a constant
71 | (typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L)))(ux) >= 0)
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:577:23: note: in definition of macro '__compiletime_assert'
577 | if (!(condition)) \
| ^~~~~~~~~
include/linux/compiler_types.h:597:9: note: in expansion of macro '_compiletime_assert'
597 | _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:70:25: note: in expansion of macro 'statically_true'
70 | #define __is_nonneg(ux) statically_true( \
| ^~~~~~~~~~~~~~~
include/linux/minmax.h:50:14: note: in expansion of macro '__is_nonneg'
50 | (2 + __is_nonneg(ux)) : (1 + 2 * (sizeof(ux) < 4)))
| ^~~~~~~~~~~
include/linux/minmax.h:75:10: note: in expansion of macro '__sign_use'
75 | (__sign_use(ux) & __sign_use(uy))
| ^~~~~~~~~~
include/linux/minmax.h:93:27: note: in expansion of macro '__types_ok'
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/macintosh/via-pmu-backlight.c:45:23: note: in expansion of macro 'max'
45 | max = max((int)bl_curve[i], max);
| ^~~
In file included from include/linux/kernel.h:27,
from arch/powerpc/include/asm/page.h:11,
from arch/powerpc/include/asm/thread_info.h:13,
from include/linux/thread_info.h:60,
from arch/powerpc/include/asm/ptrace.h:342,
from drivers/macintosh/via-pmu-backlight.c:11:
>> include/linux/math.h:162:17: error: first argument to '__builtin_choose_expr' not a constant
162 | __builtin_choose_expr( \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/math.h:170:61: note: in definition of macro '__abs_choose_expr'
170 | ({ signed type __x = (x); __x < 0 ? -__x : __x; }), other)
| ^~~~~
include/linux/math.h:158:17: note: in expansion of macro '__abs_choose_expr'
158 | __abs_choose_expr(x, long, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:159:17: note: in expansion of macro '__abs_choose_expr'
159 | __abs_choose_expr(x, int, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:160:17: note: in expansion of macro '__abs_choose_expr'
160 | __abs_choose_expr(x, short, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:161:17: note: in expansion of macro '__abs_choose_expr'
161 | __abs_choose_expr(x, char, \
| ^~~~~~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:49:28: note: in expansion of macro 'abs'
49 | int diff = abs(bl_curve[i] - value);
| ^~~
include/linux/math.h:167:43: error: first argument to '__builtin_choose_expr' not a constant
167 | #define __abs_choose_expr(x, type, other) __builtin_choose_expr( \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/math.h:170:61: note: in definition of macro '__abs_choose_expr'
170 | ({ signed type __x = (x); __x < 0 ? -__x : __x; }), other)
| ^~~~~
include/linux/math.h:158:17: note: in expansion of macro '__abs_choose_expr'
158 | __abs_choose_expr(x, long, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:159:17: note: in expansion of macro '__abs_choose_expr'
159 | __abs_choose_expr(x, int, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:160:17: note: in expansion of macro '__abs_choose_expr'
160 | __abs_choose_expr(x, short, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:161:17: note: in expansion of macro '__abs_choose_expr'
161 | __abs_choose_expr(x, char, \
| ^~~~~~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:49:28: note: in expansion of macro 'abs'
49 | int diff = abs(bl_curve[i] - value);
| ^~~
include/linux/math.h:167:43: error: first argument to '__builtin_choose_expr' not a constant
167 | #define __abs_choose_expr(x, type, other) __builtin_choose_expr( \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/math.h:170:61: note: in definition of macro '__abs_choose_expr'
170 | ({ signed type __x = (x); __x < 0 ? -__x : __x; }), other)
| ^~~~~
include/linux/math.h:158:17: note: in expansion of macro '__abs_choose_expr'
158 | __abs_choose_expr(x, long, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:159:17: note: in expansion of macro '__abs_choose_expr'
159 | __abs_choose_expr(x, int, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:160:17: note: in expansion of macro '__abs_choose_expr'
160 | __abs_choose_expr(x, short, \
| ^~~~~~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:49:28: note: in expansion of macro 'abs'
49 | int diff = abs(bl_curve[i] - value);
| ^~~
include/linux/math.h:167:43: error: first argument to '__builtin_choose_expr' not a constant
167 | #define __abs_choose_expr(x, type, other) __builtin_choose_expr( \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/math.h:170:61: note: in definition of macro '__abs_choose_expr'
170 | ({ signed type __x = (x); __x < 0 ? -__x : __x; }), other)
| ^~~~~
include/linux/math.h:158:17: note: in expansion of macro '__abs_choose_expr'
158 | __abs_choose_expr(x, long, \
| ^~~~~~~~~~~~~~~~~
include/linux/math.h:159:17: note: in expansion of macro '__abs_choose_expr'
159 | __abs_choose_expr(x, int, \
| ^~~~~~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:49:28: note: in expansion of macro 'abs'
49 | int diff = abs(bl_curve[i] - value);
| ^~~
include/linux/math.h:167:43: error: first argument to '__builtin_choose_expr' not a constant
167 | #define __abs_choose_expr(x, type, other) __builtin_choose_expr( \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/math.h:170:61: note: in definition of macro '__abs_choose_expr'
170 | ({ signed type __x = (x); __x < 0 ? -__x : __x; }), other)
| ^~~~~
include/linux/math.h:158:17: note: in expansion of macro '__abs_choose_expr'
158 | __abs_choose_expr(x, long, \
| ^~~~~~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:49:28: note: in expansion of macro 'abs'
49 | int diff = abs(bl_curve[i] - value);
| ^~~
include/linux/math.h:167:43: error: first argument to '__builtin_choose_expr' not a constant
167 | #define __abs_choose_expr(x, type, other) __builtin_choose_expr( \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/math.h:157:17: note: in expansion of macro '__abs_choose_expr'
157 | #define abs(x) __abs_choose_expr(x, long long, \
| ^~~~~~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:49:28: note: in expansion of macro 'abs'
49 | int diff = abs(bl_curve[i] - value);
| ^~~
drivers/macintosh/via-pmu-backlight.c: In function 'pmu_backlight_get_level_brightness':
drivers/macintosh/via-pmu-backlight.c:63:38: error: 'FB_BACKLIGHT_MAX' undeclared (first use in this function); did you mean 'BACKLIGHT_RAW'?
63 | pmulevel = bl_curve[level] * FB_BACKLIGHT_MAX / MAX_PMU_LEVEL;
| ^~~~~~~~~~~~~~~~
| BACKLIGHT_RAW
vim +/__builtin_choose_expr +162 include/linux/math.h
aa6159ab99a9ab Andy Shevchenko 2020-12-15 148
aa6159ab99a9ab Andy Shevchenko 2020-12-15 149 /**
aa6159ab99a9ab Andy Shevchenko 2020-12-15 150 * abs - return absolute value of an argument
aa6159ab99a9ab Andy Shevchenko 2020-12-15 151 * @x: the value. If it is unsigned type, it is converted to signed type first.
aa6159ab99a9ab Andy Shevchenko 2020-12-15 152 * char is treated as if it was signed (regardless of whether it really is)
aa6159ab99a9ab Andy Shevchenko 2020-12-15 153 * but the macro's return type is preserved as char.
aa6159ab99a9ab Andy Shevchenko 2020-12-15 154 *
aa6159ab99a9ab Andy Shevchenko 2020-12-15 155 * Return: an absolute value of x.
aa6159ab99a9ab Andy Shevchenko 2020-12-15 156 */
aa6159ab99a9ab Andy Shevchenko 2020-12-15 157 #define abs(x) __abs_choose_expr(x, long long, \
aa6159ab99a9ab Andy Shevchenko 2020-12-15 158 __abs_choose_expr(x, long, \
aa6159ab99a9ab Andy Shevchenko 2020-12-15 159 __abs_choose_expr(x, int, \
aa6159ab99a9ab Andy Shevchenko 2020-12-15 160 __abs_choose_expr(x, short, \
aa6159ab99a9ab Andy Shevchenko 2020-12-15 161 __abs_choose_expr(x, char, \
aa6159ab99a9ab Andy Shevchenko 2020-12-15 @162 __builtin_choose_expr( \
aa6159ab99a9ab Andy Shevchenko 2020-12-15 163 __builtin_types_compatible_p(typeof(x), char), \
aa6159ab99a9ab Andy Shevchenko 2020-12-15 164 (char)({ signed char __x = (x); __x<0?-__x:__x; }), \
aa6159ab99a9ab Andy Shevchenko 2020-12-15 165 ((void)0)))))))
aa6159ab99a9ab Andy Shevchenko 2020-12-15 166
:::::: The code at line 162 was first introduced by commit
:::::: aa6159ab99a9ab5df835b4750b66cf132a5aa292 kernel.h: split out mathematical helpers
:::::: TO: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2025-11-13 19:05 UTC|newest]
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