void ring_buffer_iter_advance(struct ring_buffer_iter *iter)
{
	struct ring_buffer_per_cpu *cpu_buffer = iter->cpu_buffer;
	unsigned long flags;

	raw_spin_lock_irqsave(&cpu_buffer->reader_lock, flags);

	rb_advance_iter(iter);

	raw_spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
}
void ring_buffer_iter_advance(struct ring_buffer_iter *iter)
{
	struct ring_buffer_per_cpu *cpu_buffer = iter->cpu_buffer;
	unsigned long flags;

	raw_spin_lock_irqsave(&cpu_buffer->reader_lock, flags);

	rb_advance_iter(iter);

	raw_spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
}