Re: [paulmckrcu:dev.2026.03.24a 22/31] kernel/rcu/hazptrtorture.c:508:7: error: implicit declaration of function 'torture_sched_setaffinity'; did you mean 'torture_sched_set_normal'?

On Tue, Aug 11, 2026 at 04:57:59AM +0800, kernel test robot wrote:
> tree:   https://github.com/paulmckrcu/linux dev.2026.03.24a
> head:   8600e98cae614a9336f54a79ea5c152b14369076
> commit: 16ad40d1089c5f212d7d87babc2376284f3bf244 [22/31] fixup! torture: Add a hazptrtorture.c stress test
> config: sparc64-randconfig-002-20260811 (https://download.01.org/0day-ci/archive/20260811/[email protected]/config)
> compiler: sparc64-linux-gcc (GCC) 8.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260811/[email protected]/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 <[email protected]>
> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
> 
> Note: the paulmckrcu/dev.2026.03.24a HEAD 8600e98cae614a9336f54a79ea5c152b14369076 builds fine.
>       It only hurts bisectability.
> 
> All errors (new ones prefixed by >>):
> 
>    kernel/rcu/hazptrtorture.c: In function 'hazptr_torture_preempt':
> >> kernel/rcu/hazptrtorture.c:508:7: error: implicit declaration of function 'torture_sched_setaffinity'; did you mean 'torture_sched_set_normal'? [-Werror=implicit-function-declaration]
>       if (torture_sched_setaffinity(current->pid, cpumask_of(cpu), false))
>           ^~~~~~~~~~~~~~~~~~~~~~~~~
>           torture_sched_set_normal
>    cc1: some warnings being treated as errors

Thank you for the testing, but I have long since folded this commit into
the buggy one.  Which *should* have taken care of this.  *Should*.  ;-)

							Thanx, Paul

> vim +508 kernel/rcu/hazptrtorture.c
> 
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  491  
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  492  // Randomly preempt online CPUs.
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  493  static int hazptr_torture_preempt(void *unused)
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  494  {
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  495  	int cpu = -1;
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  496  	DEFINE_TORTURE_RANDOM(rand);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  497  
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  498  	schedule_timeout_idle(onoff_holdoff * HZ);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  499  	do {
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  500  		// Wait for preempt_interval ms with up to 100us fuzz.
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  501  		torture_hrtimeout_ms(preempt_interval, 100, &rand);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  502  		// Select online CPU.
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  503  		cpu = cpumask_next(cpu, cpu_online_mask);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  504  		if (cpu >= nr_cpu_ids)
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  505  			cpu = cpumask_next(-1, cpu_online_mask);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  506  		WARN_ON_ONCE(cpu >= nr_cpu_ids);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  507  		// Move to that CPU, if can't do so, retry later.
> 26cca1d546bd55 Paul E. McKenney 2026-03-24 @508  		if (torture_sched_setaffinity(current->pid, cpumask_of(cpu), false))
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  509  			continue;
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  510  		// Preempt at high-ish priority, then reset to normal.
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  511  		sched_set_fifo(current);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  512  		torture_sched_setaffinity(current->pid, cpu_present_mask, true);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  513  		mdelay(preempt_duration);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  514  		sched_set_normal(current, 0);
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  515  		stutter_wait("hazptr_torture_preempt");
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  516  	} while (!torture_must_stop());
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  517  	torture_kthread_stopping("hazptr_torture_preempt");
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  518  	return 0;
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  519  }
> 26cca1d546bd55 Paul E. McKenney 2026-03-24  520  
> 
> :::::: The code at line 508 was first introduced by commit
> :::::: 26cca1d546bd557fdda0d8d6000dfcb80da759ab torture: Add a hazptrtorture.c stress test
> 
> :::::: TO: Paul E. McKenney <[email protected]>
> :::::: CC: Paul E. McKenney <[email protected]>
> 
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki