Comment 30 for bug 39602

This message is generated as the early kernel is figuring out what is in its address space. This range, 0xffxx0000-0xffffffff is where the BIOS lives in 32 bit address space. None of this matters to the running of the system. The address space appears to be reserved so the kernel doesn't allocate it to something else. The message is "frightening" but little else. It is just as normal as the earlier messages that reported that it could not be reserved in the iomap either. These early 64 bit parts were weird and the kernel is reporting as such.