static int select_fallback_rq(int cpu, struct task_struct *p)
{
	int dest_cpu;
	const struct cpumask *nodemask = cpumask_of_node(cpu_to_node(cpu));

	/* Look for allowed, online CPU in same node. */
	for_each_cpu_and(dest_cpu, nodemask, cpu_active_mask)
		if (cpumask_test_cpu(dest_cpu, &p->cpus_allowed))
			return dest_cpu;

	/* Any allowed, online CPU? */
	dest_cpu = cpumask_any_and(&p->cpus_allowed, cpu_active_mask);
	if (dest_cpu < nr_cpu_ids)
		return dest_cpu;

	/* No more Mr. Nice Guy. */
	if (unlikely(dest_cpu >= nr_cpu_ids)) {
		dest_cpu = cpuset_cpus_allowed_fallback(p);
		/*
		 * Don't tell them about moving exiting tasks or
		 * kernel threads (both mm NULL), since they never
		 * leave kernel.
		 */
		if (p->mm && printk_ratelimit()) {
			printk(KERN_INFO "process %d (%s) no "
			       "longer affine to cpu%d\n",
			       task_pid_nr(p), p->comm, cpu);
		}
	}

	return dest_cpu;
}
static int select_fallback_rq(int cpu, struct task_struct *p)
{
	int dest_cpu;
	const struct cpumask *nodemask = cpumask_of_node(cpu_to_node(cpu));

	 
	for_each_cpu_and(dest_cpu, nodemask, cpu_active_mask)
		if (cpumask_test_cpu(dest_cpu, &p->cpus_allowed))
			return dest_cpu;

	 
	dest_cpu = cpumask_any_and(&p->cpus_allowed, cpu_active_mask);
	if (dest_cpu < nr_cpu_ids)
		return dest_cpu;

	 
	if (unlikely(dest_cpu >= nr_cpu_ids)) {
		dest_cpu = cpuset_cpus_allowed_fallback(p);
		 
		if (p->mm && printk_ratelimit()) {
			printk(KERN_INFO "process %d (%s) no "
			       "longer affine to cpu%d\n",
			       task_pid_nr(p), p->comm, cpu);
		}
	}

	return dest_cpu;
}