IB/mad: Add const qualifiers to query only functions

The following functions only need read access to the data passed to them.

ib_mad_kernel_rmpp_agent
is_rmpp_data_mad
rcv_has_same_gid
ib_find_send_mad

Clarify with const specifiers

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h
index 69e3c45..c0ea51f 100644
--- a/include/rdma/ib_mad.h
+++ b/include/rdma/ib_mad.h
@@ -675,6 +675,6 @@
  * @agent: the agent in question
  * @return: true if agent is performing rmpp, false otherwise.
  */
-int ib_mad_kernel_rmpp_agent(struct ib_mad_agent *agent);
+int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent);
 
 #endif /* IB_MAD_H */