rdma_restrack_get
if (!rdma_restrack_get(res))
if (idx < start || !rdma_restrack_get(res))
if (!rdma_restrack_get(res))
EXPORT_SYMBOL(rdma_restrack_get);
if (!res || !rdma_restrack_get(res))
int __must_check rdma_restrack_get(struct rdma_restrack_entry *res);