RDS: Implement masked atomic operations

Add two CMSGs for masked versions of cswp and fadd. args
struct modified to use a union for different atomic op type's
arguments. Change IB to do masked atomic ops. Atomic op type
in rds_message similarly unionized.

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

1 files changed, 12 insertions, 2 deletions

diff --git a/net/rds/rds.h b/net/rds/rds.h
index aadaddba88a7..8103dcf8b976 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -316,8 +316,18 @@ struct rds_message {
         struct {
                 struct rm_atomic_op {
                         int                     op_type;
-                        uint64_t                op_swap_add;
-                        uint64_t                op_compare;
+                        union {
+                                struct {
+                                        uint64_t        compare;
+                                        uint64_t        swap;
+                                        uint64_t        compare_mask;
+                                        uint64_t        swap_mask;
+                                } op_m_cswp;
+                                struct {
+                                        uint64_t        add;
+                                        uint64_t        nocarry_mask;
+                                } op_m_fadd;
+                        };
 
                         u32                     op_rkey;
                         u64                     op_remote_addr;