func: void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
  
                          void *opaque)
  
  {
  
      SaveStateEntry *se, *new_se;
  
  
  
      QTAILQ_FOREACH_SAFE(se, &savevm_state.handlers, entry, new_se) {
  
          if (se->vmsd == vmsd && se->opaque == opaque) {
  
              QTAILQ_REMOVE(&savevm_state.handlers, se, entry);
  
              if (se->compat) {
  
                  g_free(se->compat);
  
              }
  
              g_free(se);
  
          }
  
      }
  
  }
  