RDS: break out rdma and data ops into nested structs in rds_message

Clearly separate rdma-related variables in rm from data-related ones.
This is in anticipation of adding atomic support.

Signed-off-by: Andy Grover <andy.grover@oracle.com>

1 files changed, 11 insertions, 5 deletions

diff --git a/net/rds/rds.h b/net/rds/rds.h
index 1d3eef67137f..07a750b3fb31 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -259,12 +259,18 @@ struct rds_message {
          */
         spinlock_t              m_rs_lock;
         struct rds_sock         *m_rs;
-        struct rds_rdma_op      *m_rdma_op;
         rds_rdma_cookie_t       m_rdma_cookie;
-        struct rds_mr           *m_rdma_mr;
-        unsigned int            m_nents;
-        unsigned int            m_count;
-        struct scatterlist      m_sg[0];
+        struct {
+                struct {
+                        struct rds_rdma_op      *m_rdma_op;
+                        struct rds_mr           *m_rdma_mr;
+                } rdma;
+                struct {
+                        unsigned int            m_nents;
+                        unsigned int            m_count;
+                        struct scatterlist      m_sg[0];
+                } data;
+        };
 };
 
 /*