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).

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mem/abstract_mem.hh b/src/mem/abstract_mem.hh
index 6dbc79ea0..8ab28770d 100644
--- a/src/mem/abstract_mem.hh
+++ b/src/mem/abstract_mem.hh
@@ -197,7 +197,7 @@ class AbstractMemory : public MemObject
     /**
      * Initialise this memory.
      */
-    void init();
+    void init() override;
 
     /**
      * See if this is a null memory that should never store data and
@@ -304,7 +304,7 @@ class AbstractMemory : public MemObject
     /**
      * Register Statistics
      */
-    virtual void regStats();
+    void regStats() override;
 
 };