vmbus_evtflags
req->chm_evtflags = pmap_kextract((vm_offset_t)sc->vmbus_evtflags);
sc->vmbus_evtflags = evtflags;
if (sc->vmbus_evtflags != NULL) {
free(sc->vmbus_evtflags, M_DEVBUF);
sc->vmbus_evtflags = NULL;
struct vmbus_evtflags *eventf;
struct vmbus_evtflags *eventf;
CTASSERT(sizeof(struct vmbus_evtflags) == VMBUS_EVTFLAGS_SIZE);
void *vmbus_evtflags;
struct vmbus_evtflags *event_flags; /* event flags from host */