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, 4 insertions, 4 deletions

diff --git a/src/arch/alpha/tlb.hh b/src/arch/alpha/tlb.hh
index a8bdf30e1..b9b6228e2 100644
--- a/src/arch/alpha/tlb.hh
+++ b/src/arch/alpha/tlb.hh
@@ -85,21 +85,21 @@ class TLB : public BaseTLB
     TLB(const Params *p);
     virtual ~TLB();
 
-    void takeOverFrom(BaseTLB *otlb) {}
+    void takeOverFrom(BaseTLB *otlb) override {}
 
-    virtual void regStats();
+    void regStats() override;
 
     int getsize() const { return table.size(); }
 
     TlbEntry &index(bool advance = true);
     void insert(Addr vaddr, TlbEntry &entry);
 
-    void flushAll();
+    void flushAll() override;
     void flushProcesses();
     void flushAddr(Addr addr, uint8_t asn);
 
     void
-    demapPage(Addr vaddr, uint64_t asn)
+    demapPage(Addr vaddr, uint64_t asn) override
     {
         assert(asn < (1 << 8));
         flushAddr(vaddr, asn);