diff -r 87802cb25a0f -r 2789bdd1a950 arch/x86_64/config.in
--- a/arch/x86_64/config.in	Fri Jun 27 13:58:53 2008 +0000
+++ b/arch/x86_64/config.in	Fri Jun 27 14:55:22 2008 +0000
@@ -1,3 +1,6 @@
 # x86_64 specific options
 
 config ARCH_x86_64
+    help
+      The x86_64 architecture, as defined by:
+        http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_875_7044,00.html