VRING_PACKED_EVENT_FLAG_DISABLE
needs_kick = (flags != VRING_PACKED_EVENT_FLAG_DISABLE);
if (vq->packed.event_flags_shadow != VRING_PACKED_EVENT_FLAG_DISABLE) {
vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE;
if (vq->packed.event_flags_shadow == VRING_PACKED_EVENT_FLAG_DISABLE) {
if (vq->packed.event_flags_shadow == VRING_PACKED_EVENT_FLAG_DISABLE) {
vring_packed->event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE;