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/freebsd-10.3-release/sys/dev/virtio/
H A Dvirtqueue.c772 uint16_t new_idx, prev_idx, event_idx; local
776 prev_idx = new_idx - vq->vq_queued_cnt;
779 return (vring_need_event(event_idx, new_idx, prev_idx) != 0);

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