[sashal-stable:pending-5.16 35/73] kernel/sched/fair.c:3796:55: error: 'divider' undeclared

[sashal-stable:pending-5.16 35/73] kernel/sched/fair.c:3796:55: error: 'divider' undeclared

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 5282 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-5.16
head:   51f919289215d09b2aeca5dc7f27639f21ad7d1e
commit: b765f44bc5887dafdcc7eeb33cee10d448cd1f2a [35/73] sched/pelt: Relax the sync of runnable_sum with runnable_avg
config: arc-randconfig-r043-20220211 (https://download.01.org/0day-ci/archive/20220212/202202120638.Lth8u00j-lkp(a)intel.com/config)
compiler: arc-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/commit/?id=b765f44bc5887dafdcc7eeb33cee10d448cd1f2a
        git remote add sashal-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git
        git fetch --no-tags sashal-stable pending-5.16
        git checkout b765f44bc5887dafdcc7eeb33cee10d448cd1f2a
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   kernel/sched/fair.c: In function 'detach_entity_load_avg':
>> kernel/sched/fair.c:3796:55: error: 'divider' undeclared (first use in this function)
    3796 |         cfs_rq->avg.util_sum = cfs_rq->avg.util_avg * divider;
         |                                                       ^~~~~~~
   kernel/sched/fair.c:3796:55: note: each undeclared identifier is reported only once for each function it appears in
   In file included from include/linux/perf_event.h:25,
                    from include/linux/trace_events.h:10,
                    from include/trace/syscall.h:7,
                    from include/linux/syscalls.h:88,
                    from kernel/sched/sched.h:66,
                    from kernel/sched/fair.c:23:
   At top level:
   arch/arc/include/asm/perf_event.h:126:27: warning: 'arc_pmu_cache_map' defined but not used [-Wunused-const-variable=]
     126 | static const unsigned int arc_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
         |                           ^~~~~~~~~~~~~~~~~
   arch/arc/include/asm/perf_event.h:91:27: warning: 'arc_pmu_ev_hw_map' defined but not used [-Wunused-const-variable=]
      91 | static const char * const arc_pmu_ev_hw_map[] = {
         |                           ^~~~~~~~~~~~~~~~~


vim +/divider +3796 kernel/sched/fair.c

a05e8c51ff097f Byungchul Park  2015-08-20  3783  
3d30544f02120b Peter Zijlstra  2016-06-21  3784  /**
3d30544f02120b Peter Zijlstra  2016-06-21  3785   * detach_entity_load_avg - detach this entity from its cfs_rq load avg
3d30544f02120b Peter Zijlstra  2016-06-21  3786   * @cfs_rq: cfs_rq to detach from
3d30544f02120b Peter Zijlstra  2016-06-21  3787   * @se: sched_entity to detach
3d30544f02120b Peter Zijlstra  2016-06-21  3788   *
3d30544f02120b Peter Zijlstra  2016-06-21  3789   * Must call update_cfs_rq_load_avg() before this, since we rely on
3d30544f02120b Peter Zijlstra  2016-06-21  3790   * cfs_rq->avg.last_update_time being current.
3d30544f02120b Peter Zijlstra  2016-06-21  3791   */
a05e8c51ff097f Byungchul Park  2015-08-20  3792  static void detach_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se)
a05e8c51ff097f Byungchul Park  2015-08-20  3793  {
8d5b9025f9b450 Peter Zijlstra  2017-08-24  3794  	dequeue_load_avg(cfs_rq, se);
89741892221591 Peter Zijlstra  2016-06-16  3795  	sub_positive(&cfs_rq->avg.util_avg, se->avg.util_avg);
fcf6631f373698 Vincent Guittot 2021-06-01 @3796  	cfs_rq->avg.util_sum = cfs_rq->avg.util_avg * divider;
9f68395333ad7f Vincent Guittot 2020-02-24  3797  	sub_positive(&cfs_rq->avg.runnable_avg, se->avg.runnable_avg);
b765f44bc5887d Vincent Guittot 2022-01-11  3798  	sub_positive(&cfs_rq->avg.runnable_sum, se->avg.runnable_sum);
b765f44bc5887d Vincent Guittot 2022-01-11  3799  	/* See update_cfs_rq_load_avg() */
b765f44bc5887d Vincent Guittot 2022-01-11  3800  	cfs_rq->avg.runnable_sum = max_t(u32, cfs_rq->avg.runnable_sum,
b765f44bc5887d Vincent Guittot 2022-01-11  3801  					      cfs_rq->avg.runnable_avg * PELT_MIN_DIVIDER);
0e2d2aaaae52c2 Peter Zijlstra  2017-05-08  3802  
0e2d2aaaae52c2 Peter Zijlstra  2017-05-08  3803  	add_tg_cfs_propagate(cfs_rq, -se->avg.load_sum);
a2c6c91f98247f Steve Muckle    2016-03-24  3804  
ea14b57e8a181a Peter Zijlstra  2018-02-02  3805  	cfs_rq_util_change(cfs_rq, 0);
ba19f51fcb549c Qais Yousef     2019-06-04  3806  
ba19f51fcb549c Qais Yousef     2019-06-04  3807  	trace_pelt_cfs_tp(cfs_rq);
a05e8c51ff097f Byungchul Park  2015-08-20  3808  }
a05e8c51ff097f Byungchul Park  2015-08-20  3809  

:::::: The code at line 3796 was first introduced by commit
:::::: fcf6631f3736985ec89bdd76392d3c7bfb60119f sched/pelt: Ensure that *_sum is always synced with *_avg

:::::: TO: Vincent Guittot <vincent.guittot@linaro.org>
:::::: CC: Peter Zijlstra <peterz@infradead.org>

---
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