VMBUS_CHAN_ATTR
static VMBUS_CHAN_ATTR(cpu, 0644, target_cpu_show, target_cpu_store);
static VMBUS_CHAN_ATTR(pending, 0444, channel_pending_show, NULL);
static VMBUS_CHAN_ATTR(latency, 0444, channel_latency_show, NULL);
static VMBUS_CHAN_ATTR(interrupts, 0444, channel_interrupts_show, NULL);
static VMBUS_CHAN_ATTR(events, 0444, channel_events_show, NULL);
static VMBUS_CHAN_ATTR(intr_in_full, 0444, channel_intr_in_full_show, NULL);
static VMBUS_CHAN_ATTR(intr_out_empty, 0444, channel_intr_out_empty_show, NULL);
static VMBUS_CHAN_ATTR(out_full_first, 0444, channel_out_full_first_show, NULL);
static VMBUS_CHAN_ATTR(out_full_total, 0444, channel_out_full_total_show, NULL);
static VMBUS_CHAN_ATTR(monitor_id, 0444, subchannel_monitor_id_show, NULL);