[PATCH] C undefined behavior fix

[dewar@gnat.com]

<<Or to put it another way: The Linux kernel developers NEED an
implementation defined way to build a pointer from an address.  If
arithmatic on byte pointers isn't it (which is perfectly understandable)
and casting a pointer from an integer isn't it, then can someone please
tell us (not just "that will work for now" or "that will probably work")
how do we do that?
>>

Now that's a very reasonable question. Note that it is not just
kernel developers who need this, anyone doing memory mapped I/O
needs similar capabilities. They are present explicitly in Ada
(with address clauses), but not in C, so you do indeed need to
decide how to provide this capability in a reasonable manner.