The definition of NR_EVENT_CHANNELS is now depending on macro defined in
xen/interface/event_channel.h
#define FIRST_MSI_INT 256
#ifdef XENHVM
#include <xen/xen-os.h>
+#include <xen/interface/event_channel.h>
#define NUM_EVTCHN_INTS NR_EVENT_CHANNELS
#define FIRST_EVTCHN_INT \
(FIRST_MSI_INT + NUM_MSI_INTS)
#define FIRST_MSI_INT 256
#ifdef XENHVM
#include <xen/xen-os.h>
+#include <xen/interface/event_channel.h>
#define NUM_EVTCHN_INTS NR_EVENT_CHANNELS
#define FIRST_EVTCHN_INT \
(FIRST_MSI_INT + NUM_MSI_INTS)