Smart Pointer problem

{ Please avoid too long lines; it's best to limit your text to
   70 columns or so, less than 80 at least. In addition, please consider
   using a charset that fits the English environment better, such as
   US-ASCII or ISO-8859-*. -mod }

We have our smart pointer implementation. But the operator -> is
creating problem in case of a const pointer. It's always returning a
non-const pointer, therefore, we are able to call a non const function
on a const pointer. How can we overcome this problem?
Smart pointer code.

       /**
      *  Returns the raw pointer for use in calling member functions.
      */
       T *operator->() const
       {
             return m_p;
       }

Sample Code:

class Test {
public:
	void ChangeData(int a, int b)
	{
		X = a;
                 Y = b;
	}
private:
	int x;
	int y;
};
typedef CC::CSmartPointer<Test> TestPtr;

Void TestData(const TestPtr& test)
{
                // here. We should get the compilation error. But it’s
working fine due to behavior of
                //the Smart Pointer operator -> .

              test->ChangeData(x, y);
}


-- 
      [ See http://www.gotw.ca/resources/clcm.htm
for info about ]
      [ comp.lang.c++.moderated.    First time posters: Do this! ]