[rafael-pm:bleeding-edge 103/108] drivers/powercap/dtpm_cpu.c:83:15: error: call to undeclared function 'sched_cpu_util'; ISO C99 and later do not support implicit function declarations

kernel test robot
2025-03-06T19:34:50Z

Hi Jeson,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git bleeding-edge
head: 96791086aa226b85fe090573b9e3668ac53d5364
commit: 9144584c375e73a4fef6bde3ce399ad43e011b37 [103/108] PM: EM: Rework the depends on for CONFIG_ENERGY_MODEL
config: um-allmodconfig (https://download.01.org/0day-ci/archive/20250307/202503070326.9hEUez42-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project 14170b16028c087ca154878f5ed93d3089a965c6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250307/202503070326.9hEUez42-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/202503070326.9hEUez42-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/powercap/dtpm_cpu.c:83:15: error: call to undeclared function 'sched_cpu_util'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
83 | sum_util += sched_cpu_util(cpu);
| ^
1 error generated.

vim +/sched_cpu_util +83 drivers/powercap/dtpm_cpu.c

0e8f68d7f04856 Daniel Lezcano 2020-12-08 70
eb82bace893169 Daniel Lezcano 2021-03-12 71 static u64 scale_pd_power_uw(struct cpumask *pd_mask, u64 power)
eb82bace893169 Daniel Lezcano 2021-03-12 72 {
bb4479994945e9 Dietmar Eggemann 2022-06-21 73 unsigned long max, sum_util = 0;
eb82bace893169 Daniel Lezcano 2021-03-12 74 int cpu;
eb82bace893169 Daniel Lezcano 2021-03-12 75
eb82bace893169 Daniel Lezcano 2021-03-12 76 /*
eb82bace893169 Daniel Lezcano 2021-03-12 77 * The capacity is the same for all CPUs belonging to
bb4479994945e9 Dietmar Eggemann 2022-06-21 78 * the same perf domain.
eb82bace893169 Daniel Lezcano 2021-03-12 79 */
bb4479994945e9 Dietmar Eggemann 2022-06-21 80 max = arch_scale_cpu_capacity(cpumask_first(pd_mask));
eb82bace893169 Daniel Lezcano 2021-03-12 81
bb4479994945e9 Dietmar Eggemann 2022-06-21 82 for_each_cpu_and(cpu, pd_mask, cpu_online_mask)
bb4479994945e9 Dietmar Eggemann 2022-06-21 @83 sum_util += sched_cpu_util(cpu);
bb4479994945e9 Dietmar Eggemann 2022-06-21 84
bb4479994945e9 Dietmar Eggemann 2022-06-21 85 return (power * ((sum_util << 10) / max)) >> 10;
eb82bace893169 Daniel Lezcano 2021-03-12 86 }
eb82bace893169 Daniel Lezcano 2021-03-12 87

:::::: The code at line 83 was first introduced by commit
:::::: bb4479994945e9170534389a7762eb56149320ac sched, drivers: Remove max param from effective_cpu_util()/sched_cpu_util()

:::::: TO: Dietmar Eggemann <dietmar.eggemann@arm.com>
:::::: CC: Peter Zijlstra <peterz@infradead.org>

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