1. 23deb06 x86: move x86-specific documentation into Documentation/x86 by H. Peter Anvin · 16 years ago[Renamed from Documentation/x86_64/cpu-hotplug-spec]
  2. 57d3077 [PATCH] x86-64: cleanup Doc/x86_64/ files by Randy Dunlap · 17 years ago
  3. 7eb903f [PATCH] x86_64: Add documentation for CPU hotplug ACPI extension by Andi Kleen · 19 years ago