misc: Add explicit overrides and fix other clang >= 3.5 issues

This patch adds explicit overrides as this is now required when using
"-Wall" with clang >= 3.5, the latter now part of the most recent
XCode. The patch consequently removes "virtual" for those methods
where "override" is added. The latter should be enough of an
indication.

As part of this patch, a few minor issues that clang >= 3.5 complains
about are also resolved (unused methods and variables).

3 files changed, 9 insertions, 9 deletions

diff --git a/src/mem/ruby/system/DMASequencer.hh b/src/mem/ruby/system/DMASequencer.hh
index 1d5451f6e..34f9be34c 100644
--- a/src/mem/ruby/system/DMASequencer.hh
+++ b/src/mem/ruby/system/DMASequencer.hh
@@ -60,7 +60,7 @@ class DMASequencer : public MemObject
   public:
     typedef DMASequencerParams Params;
     DMASequencer(const Params *);
-    void init();
+    void init() override;
     RubySystem *m_ruby_system;
 
   public:
@@ -95,7 +95,7 @@ class DMASequencer : public MemObject
     };
 
     BaseSlavePort &getSlavePort(const std::string &if_name,
-                                PortID idx = InvalidPortID);
+                                PortID idx = InvalidPortID) override;
 
     /* external interface */
     RequestStatus makeRequest(PacketPtr pkt);
diff --git a/src/mem/ruby/system/RubyPort.hh b/src/mem/ruby/system/RubyPort.hh
index 98fab8c4e..58d2558dd 100644
--- a/src/mem/ruby/system/RubyPort.hh
+++ b/src/mem/ruby/system/RubyPort.hh
@@ -143,12 +143,12 @@ class RubyPort : public MemObject
     RubyPort(const Params *p);
     virtual ~RubyPort() {}
 
-    void init();
+    void init() override;
 
     BaseMasterPort &getMasterPort(const std::string &if_name,
-                                  PortID idx = InvalidPortID);
+                                  PortID idx = InvalidPortID) override;
     BaseSlavePort &getSlavePort(const std::string &if_name,
-                                PortID idx = InvalidPortID);
+                                PortID idx = InvalidPortID) override;
 
     virtual RequestStatus makeRequest(PacketPtr pkt) = 0;
     virtual int outstandingCount() const = 0;
diff --git a/src/mem/ruby/system/RubySystem.hh b/src/mem/ruby/system/RubySystem.hh
index 23974e924..e396dce64 100644
--- a/src/mem/ruby/system/RubySystem.hh
+++ b/src/mem/ruby/system/RubySystem.hh
@@ -89,16 +89,16 @@ class RubySystem : public ClockedObject
         return m_profiler;
     }
 
-    void regStats() { m_profiler->regStats(name()); }
+    void regStats() override { m_profiler->regStats(name()); }
     void collateStats() { m_profiler->collateStats(); }
-    void resetStats();
+    void resetStats() override;
 
-    void memWriteback();
+    void memWriteback() override;
     void serialize(CheckpointOut &cp) const override;
     void unserialize(CheckpointIn &cp) override;
     void drainResume() override;
     void process();
-    void startup();
+    void startup() override;
     bool functionalRead(Packet *ptr);
     bool functionalWrite(Packet *ptr);