VOID KiDisableFastSyscallReturn( VOID ); Routine Description: The fast syscall/return feature cannot be used until certain processor specific registers have been initialized. This routine is called when the system is switching to a state where not all processors are powered on. This routine adjusts the exit path for system calls to use the iretd instruction instead of the faster sysexit instruction, it accomplishes this by adjusting the offset of a branch. Arguments: None. Return Value: None.