* [peterz-queue:sched/flat 21/21] kernel/sched/fair.c:4067:1: warning: control reaches end of non-void function
@ 2026-03-20 8:49 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-03-20 8:49 UTC (permalink / raw)
To: Peter Zijlstra (Intel); +Cc: oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/flat
head: 4974c93ce402d69988eb7b2e9e490c22cc22bb7b
commit: 4974c93ce402d69988eb7b2e9e490c22cc22bb7b [21/21] sched/eevdf: Move to a single runqueue
config: i386-allnoconfig (https://download.01.org/0day-ci/archive/20260320/202603201652.XGsoWx79-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260320/202603201652.XGsoWx79-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/202603201652.XGsoWx79-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
In file included from include/linux/nodemask.h:92,
from include/linux/numa.h:6,
from include/linux/cpumask.h:15,
from include/linux/energy_model.h:4,
from kernel/sched/fair.c:23:
kernel/sched/fair.c: In function '__calc_prop_weight':
kernel/sched/fair.c:4066:28: error: 'MIN_SHARES' undeclared (first use in this function)
4066 | return max(weight, MIN_SHARES);
| ^~~~~~~~~~
include/linux/minmax.h:92:35: note: in definition of macro '__careful_cmp_once'
92 | auto ux = (x); auto uy = (y); \
| ^
include/linux/minmax.h:112:25: note: in expansion of macro '__careful_cmp'
112 | #define max(x, y) __careful_cmp(max, x, y)
| ^~~~~~~~~~~~~
kernel/sched/fair.c:4066:16: note: in expansion of macro 'max'
4066 | return max(weight, MIN_SHARES);
| ^~~
kernel/sched/fair.c:4066:28: note: each undeclared identifier is reported only once for each function it appears in
4066 | return max(weight, MIN_SHARES);
| ^~~~~~~~~~
include/linux/minmax.h:92:35: note: in definition of macro '__careful_cmp_once'
92 | auto ux = (x); auto uy = (y); \
| ^
include/linux/minmax.h:112:25: note: in expansion of macro '__careful_cmp'
112 | #define max(x, y) __careful_cmp(max, x, y)
| ^~~~~~~~~~~~~
kernel/sched/fair.c:4066:16: note: in expansion of macro 'max'
4066 | return max(weight, MIN_SHARES);
| ^~~
In file included from <command-line>:
>> include/linux/compiler.h:168:17: error: '__UNIQUE_ID_y__460' undeclared (first use in this function); did you mean '__UNIQUE_ID_x__459'?
168 | __PASTE(__UNIQUE_ID_, \
| ^~~~~~~~~~~~
include/linux/compiler_types.h:686:23: note: in definition of macro '__compiletime_assert'
686 | if (!(condition)) \
| ^~~~~~~~~
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:93:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
93 | BUILD_BUG_ON_MSG(!__types_ok(ux, uy), \
| ^~~~~~~~~~~~~~~~
include/linux/minmax.h:49:25: note: in expansion of macro 'is_signed_type'
49 | #define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
| ^~~~~~~~~~~~~~
include/linux/minmax.h:75:27: 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/compiler_types.h:16:23: note: in expansion of macro '___PASTE'
16 | #define __PASTE(a, b) ___PASTE(a, b)
| ^~~~~~~~
include/linux/compiler.h:168:9: note: in expansion of macro '__PASTE'
168 | __PASTE(__UNIQUE_ID_, \
| ^~~~~~~
include/linux/minmax.h:98:55: 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)
| ^~~~~~~~~~~~~
kernel/sched/fair.c:4066:16: note: in expansion of macro 'max'
4066 | return max(weight, MIN_SHARES);
| ^~~
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:686:23: note: in definition of macro '__compiletime_assert'
686 | if (!(condition)) \
| ^~~~~~~~~
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: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:75:27: 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)
| ^~~~~~~~~~~~~
kernel/sched/fair.c:4066:16: note: in expansion of macro 'max'
4066 | return max(weight, MIN_SHARES);
| ^~~
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:686:23: note: in definition of macro '__compiletime_assert'
686 | if (!(condition)) \
| ^~~~~~~~~
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: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:75:27: 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)
| ^~~~~~~~~~~~~
kernel/sched/fair.c:4066:16: note: in expansion of macro 'max'
4066 | return max(weight, MIN_SHARES);
| ^~~
>> kernel/sched/fair.c:4067:1: warning: control reaches end of non-void function [-Wreturn-type]
4067 | }
| ^
vim +4067 kernel/sched/fair.c
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4050)
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4051) /*
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4052) * weight = NICE_0_LOAD;
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4053) * for_each_entity_se(se)
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4054) * weight = __calc_prop_weight(cfs_rq_of(se), se, weight);
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4055) */
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4056) static __always_inline
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4057) unsigned long __calc_prop_weight(struct cfs_rq *cfs_rq, struct sched_entity *se,
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4058) unsigned long weight)
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4059) {
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4060) weight *= se->load.weight;
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4061) if (parent_entity(se))
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4062) weight /= cfs_rq->load.weight;
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4063) else
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4064) weight /= NICE_0_LOAD;
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 4065)
4974c93ce402d6 Peter Zijlstra (Intel 2025-12-06 @4066) return max(weight, MIN_SHARES);
af4cf40470c22e Peter Zijlstra 2023-05-31 @4067 }
9059393e4ec1c8 Vincent Guittot 2017-05-17 4068
:::::: The code at line 4067 was first introduced by commit
:::::: af4cf40470c22efa3987200fd19478199e08e103 sched/fair: Add cfs_rq::avg_vruntime
:::::: TO: Peter Zijlstra <peterz@infradead.org>
:::::: CC: Ingo Molnar <mingo@kernel.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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