long sched_getaffinity(pid_t pid, struct cpumask *mask)
{
	struct task_struct *p;
	unsigned long flags;
	int retval;

	rcu_read_lock();

	retval = -ESRCH;
	p = find_process_by_pid(pid);
	if (!p)
		goto out_unlock;

	retval = security_task_getscheduler(p);
	if (retval)
		goto out_unlock;

	raw_spin_lock_irqsave(&p->pi_lock, flags);
	cpumask_and(mask, &p->cpus_allowed, cpu_active_mask);
	raw_spin_unlock_irqrestore(&p->pi_lock, flags);

out_unlock:
	rcu_read_unlock();

	return retval;
}
Unknown