- Optimize __copy*user a bit.
 - Merge with 2.5.53/i386
 - Fix broken 32bit signal handling.
 - Implement AT_SYSINFO and a vsyscall page for 32bit programs.
 - Fix 32bit SYSCALL entry point to handle 6 arguments and restart correctly.
 - Add oprofile support (Vojtech Pavlik, with changes by me)
   This is shared code with i386.