virtio-core: Fix a warning
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@@ -59,7 +59,7 @@ pub fn spawn_irq_thread(irq_handle: &File, queue: &Arc<Queue<'static>>) {
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let queue_copy = queue.clone();
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std::thread::spawn(move || {
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let mut event_queue = RawEventQueue::new().unwrap();
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let event_queue = RawEventQueue::new().unwrap();
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event_queue
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.subscribe(irq_fd as usize, 0, event::EventFlags::READ)
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