[kbuild-all] [intel-lts:4.19/preempt-rt 5/10] kernel/sched/fair.c:6190:54: error: 'struct task_struct' has no member named 'cpus_allowed'; did you mean 'nr_cpus_allowed'?

Saturday, 13 November 2021

tree:   https://github.com/intel/linux-intel-lts.git 4.19/preempt-rt
head:   5869b5f01603be1b382db99b966071ac9d840daf
commit: cc00a48f20c9ce3f9ae449e55dfdf9fb976ecee1 [5/10] Merge tag
'lts-v4.19.195-base-210628T072840Z' into lts2019/yocto-rt
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-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://github.com/intel/linux-intel-lts/commit/cc00a48f20c9ce3f9ae449e55...
        git remote add intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-lts 4.19/preempt-rt
        git checkout cc00a48f20c9ce3f9ae449e55dfdf9fb976ecee1
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir
ARCH=ia64 SHELL=/bin/bash kernel/sched/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;

Note: the intel-lts/4.19/preempt-rt HEAD 5869b5f01603be1b382db99b966071ac9d840daf builds
fine.
      It only hurts bisectability.

All errors (new ones prefixed by >>):

   kernel/sched/fair.c:3656:6: warning: no previous prototype for
'sync_entity_load_avg' [-Wmissing-prototypes]
    3656 | void sync_entity_load_avg(struct sched_entity *se)
         |      ^~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:3669:6: warning: no previous prototype for
'remove_entity_load_avg' [-Wmissing-prototypes]
    3669 | void remove_entity_load_avg(struct sched_entity *se)
         |      ^~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c: In function 'select_idle_cpu':
...
> kernel/sched/fair.c:6190:54: error: 'struct task_struct'
has no member named 'cpus_allowed'; did you mean 'nr_cpus_allowed'? 
   6190 |         cpumask_and(cpus, sched_domain_span(sd), &p->cpus_allowed);
         |                                                      ^~~~~~~~~~~~
         |                                                      nr_cpus_allowed
   kernel/sched/fair.c: In function 'update_blocked_averages':
   kernel/sched/fair.c:7499:14: warning: variable 'done' set but not used
[-Wunused-but-set-variable]
    7499 |         bool done = true;
         |              ^~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for FRAME_POINTER
   Depends on DEBUG_KERNEL && (M68K || UML || SUPERH) || ARCH_WANT_FRAME_POINTERS
   Selected by
   - FAULT_INJECTION_STACKTRACE_FILTER && FAULT_INJECTION_DEBUG_FS &&
STACKTRACE_SUPPORT && !X86_64 && !MIPS && !PPC && !S390
&& !MICROBLAZE && !ARM_UNWIND && !ARC && !X86

vim +6190 kernel/sched/fair.c

10e2f1acd0106c Peter Zijlstra 2016-05-09  6151  
10e2f1acd0106c Peter Zijlstra 2016-05-09  6152  /*
10e2f1acd0106c Peter Zijlstra 2016-05-09  6153   * Scan the LLC domain for idle CPUs; this
is dynamically regulated by
10e2f1acd0106c Peter Zijlstra 2016-05-09  6154   * comparing the average scan cost
(tracked in sd->avg_scan_cost) against the
10e2f1acd0106c Peter Zijlstra 2016-05-09  6155   * average idle time for this rq (as found
in rq->avg_idle).
10e2f1acd0106c Peter Zijlstra 2016-05-09  6156   */
10e2f1acd0106c Peter Zijlstra 2016-05-09  6157  static int select_idle_cpu(struct
task_struct *p, struct sched_domain *sd, int target)
10e2f1acd0106c Peter Zijlstra 2016-05-09  6158  {
b5cd7f229609cf Cheng Jian     2019-12-13  6159  	struct cpumask *cpus =
this_cpu_cpumask_var_ptr(select_idle_mask);
9cfb38a7ba5a9c Wanpeng Li     2016-10-09  6160  	struct sched_domain *this_sd;
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6161  	u64 avg_cost, avg_idle;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6162  	u64 time, cost;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6163  	s64 delta;
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6164  	int cpu, nr = INT_MAX;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6165  
9cfb38a7ba5a9c Wanpeng Li     2016-10-09  6166  	this_sd =
rcu_dereference(*this_cpu_ptr(&sd_llc));
9cfb38a7ba5a9c Wanpeng Li     2016-10-09  6167  	if (!this_sd)
9cfb38a7ba5a9c Wanpeng Li     2016-10-09  6168  		return -1;
9cfb38a7ba5a9c Wanpeng Li     2016-10-09  6169  
10e2f1acd0106c Peter Zijlstra 2016-05-09  6170  	/*
10e2f1acd0106c Peter Zijlstra 2016-05-09  6171  	 * Due to large variance we need a large
fuzz factor; hackbench in
10e2f1acd0106c Peter Zijlstra 2016-05-09  6172  	 * particularly is sensitive here.
10e2f1acd0106c Peter Zijlstra 2016-05-09  6173  	 */
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6174  	avg_idle = this_rq()->avg_idle / 512;
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6175  	avg_cost = this_sd->avg_scan_cost +
1;
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6176  
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6177  	if (sched_feat(SIS_AVG_CPU) &&
avg_idle < avg_cost)
10e2f1acd0106c Peter Zijlstra 2016-05-09  6178  		return -1;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6179  
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6180  	if (sched_feat(SIS_PROP)) {
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6181  		u64 span_avg = sd->span_weight *
avg_idle;
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6182  		if (span_avg > 4*avg_cost)
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6183  			nr = div_u64(span_avg, avg_cost);
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6184  		else
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6185  			nr = 4;
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6186  	}
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6187  
10e2f1acd0106c Peter Zijlstra 2016-05-09  6188  	time = local_clock();
10e2f1acd0106c Peter Zijlstra 2016-05-09  6189  
b5cd7f229609cf Cheng Jian     2019-12-13 @6190  	cpumask_and(cpus, sched_domain_span(sd),
&p->cpus_allowed);
b5cd7f229609cf Cheng Jian     2019-12-13  6191  
b5cd7f229609cf Cheng Jian     2019-12-13  6192  	for_each_cpu_wrap(cpu, cpus, target) {
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6193  		if (!--nr)
1ad3aaf3fcd244 Peter Zijlstra 2017-05-17  6194  			return -1;
943d355d7feef3 Rohit Jain     2018-05-09  6195  		if (available_idle_cpu(cpu))
10e2f1acd0106c Peter Zijlstra 2016-05-09  6196  			break;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6197  	}
10e2f1acd0106c Peter Zijlstra 2016-05-09  6198  
10e2f1acd0106c Peter Zijlstra 2016-05-09  6199  	time = local_clock() - time;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6200  	cost = this_sd->avg_scan_cost;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6201  	delta = (s64)(time - cost) / 8;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6202  	this_sd->avg_scan_cost += delta;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6203  
10e2f1acd0106c Peter Zijlstra 2016-05-09  6204  	return cpu;
10e2f1acd0106c Peter Zijlstra 2016-05-09  6205  }
10e2f1acd0106c Peter Zijlstra 2016-05-09  6206  

:::::: The code at line 6190 was first introduced by commit
:::::: b5cd7f229609cf328664aedb056a6fd744e0068b sched/fair: Optimize select_idle_cpu

:::::: TO: Cheng Jian <cj.chengjian(a)huawei.com&gt;
:::::: CC: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt;

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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[kbuild-all] [intel-lts:4.19/preempt-rt 5/10] kernel/sched/fair.c:6190:54: error: 'struct task_struct' has no member named 'cpus_allowed'; did you mean 'nr_cpus_allowed'?