5 files changed, 14 insertions, 14 deletions

diff --git a/sql/mdl.h b/sql/mdl.h
index a537022484f..952d97d301c 100644
--- a/sql/mdl.h
+++ b/sql/mdl.h
@@ -456,7 +456,7 @@ public:
 
   static void *operator new(size_t size, MEM_ROOT *mem_root) throw ()
   { return alloc_root(mem_root, size); }
-  static void operator delete(void *ptr, MEM_ROOT *mem_root) {}
+  static void operator delete(void *, MEM_ROOT *) {}
 
   void init(MDL_key::enum_mdl_namespace namespace_arg,
             const char *db_arg, const char *name_arg,
@@ -497,7 +497,7 @@ public:
     is mandatory. Can only be used before the request has been
     granted.
   */
-  MDL_request& operator=(const MDL_request &rhs)
+  MDL_request& operator=(const MDL_request &)
   {
     ticket= NULL;
     /* Do nothing, in particular, don't try to copy the key. */
diff --git a/sql/sql_alloc.h b/sql/sql_alloc.h
index c3bee260817..153b0401e29 100644
--- a/sql/sql_alloc.h
+++ b/sql/sql_alloc.h
@@ -39,7 +39,7 @@ public:
   { return alloc_root(mem_root, size); }
   static void operator delete(void *ptr, size_t size) { TRASH_FREE(ptr, size); }
   static void operator delete(void *, MEM_ROOT *){}
-  static void operator delete[](void *ptr, MEM_ROOT *mem_root)
+  static void operator delete[](void *, MEM_ROOT *)
   { /* never called */ }
   static void operator delete[](void *ptr, size_t size) { TRASH_FREE(ptr, size); }
 #ifdef HAVE_valgrind
diff --git a/sql/sql_list.h b/sql/sql_list.h
index 311e601490b..1f069ef9388 100644
--- a/sql/sql_list.h
+++ b/sql/sql_list.h
@@ -164,7 +164,7 @@ public:
   */
   bool copy(const base_list *rhs, MEM_ROOT *mem_root);
   base_list(const base_list &rhs, MEM_ROOT *mem_root) { copy(&rhs, mem_root); }
-  inline base_list(bool error) { }
+  inline base_list(bool) {}
   inline bool push_back(void *info)
   {
     if (((*last)=new list_node(info, &end_of_list)))
@@ -533,10 +533,10 @@ public:
 template <class T> class List_iterator_fast :public base_list_iterator
 {
 protected:
-  inline T *replace(T *a)   { return (T*) 0; }
-  inline T *replace(List<T> &a) { return (T*) 0; }
-  inline void remove(void)  { }
-  inline void after(T *a)   { }
+  inline T *replace(T *)   { return (T*) 0; }
+  inline T *replace(List<T> &) { return (T*) 0; }
+  inline void remove(void)  {}
+  inline void after(T *)    {}
   inline T** ref(void)	    { return (T**) 0; }
 
 public:
@@ -605,7 +605,7 @@ struct ilink
   {
     return (void*)my_malloc((uint)size, MYF(MY_WME | MY_FAE | ME_FATALERROR));
   }
-  static void operator delete(void* ptr_arg, size_t size)
+  static void operator delete(void* ptr_arg, size_t)
   {
      my_free(ptr_arg);
   }
diff --git a/sql/sql_plist.h b/sql/sql_plist.h
index 14f6eb5e2aa..bb9889cc534 100644
--- a/sql/sql_plist.h
+++ b/sql/sql_plist.h
@@ -230,7 +230,7 @@ protected:
   void reset() {}
   void inc() {}
   void dec() {}
-  void swap(I_P_List_null_counter &rhs) {}
+  void swap(I_P_List_null_counter &) {}
 };
 
 
@@ -262,14 +262,14 @@ public:
 template <typename T> class I_P_List_no_push_back
 {
 protected:
-  I_P_List_no_push_back(T **a) {};
-  void set_last(T **a) {}
+  I_P_List_no_push_back(T **) {}
+  void set_last(T **) {}
   /*
     T** get_last() const method is intentionally left unimplemented
     in order to prohibit usage of push_back() method in lists which
     use this policy.
   */
-  void swap(I_P_List_no_push_back<T> &rhs) {}
+  void swap(I_P_List_no_push_back<T> &) {}
 };
 
 
diff --git a/sql/sql_string.h b/sql/sql_string.h
index afbfa157a2b..e30132a427d 100644
--- a/sql/sql_string.h
+++ b/sql/sql_string.h
@@ -190,7 +190,7 @@ public:
   { /* never called */ }
   static void operator delete[](void *ptr, size_t size)
   { TRASH_FREE(ptr, size); }
-  static void operator delete[](void *ptr, MEM_ROOT *mem_root)
+  static void operator delete[](void *, MEM_ROOT *)
   { /* never called */ }
 
   ~String() { free(); }