rds_rdma_unuse    924 net/rds/rds.h  void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force);
rds_rdma_unuse    183 net/rds/recv.c 			rds_rdma_unuse(rs, be32_to_cpu(buffer.rdma.h_rdma_rkey), 0);
rds_rdma_unuse   1410 net/rds/send.c 		rds_rdma_unuse(rs, rds_rdma_cookie_key(rm->m_rdma_cookie), 1);