Index: linux/Documentation/kernel-parameters.txt
===================================================================
--- linux.orig/Documentation/kernel-parameters.txt	2012-06-26 14:37:24.000000000 +0900
+++ linux/Documentation/kernel-parameters.txt	2012-07-04 10:00:58.822901307 +0900
@@ -2168,6 +2168,12 @@ bytes respectively. Such letter suffixes
 		cbmemsize=nn[KMG]	The fixed amount of bus space which is
 				reserved for the CardBus bridge's memory
 				window. The default value is 64 megabytes.
+		hpiosize	The fixed amount of bus space which is
+				reserved for hotplug bridge's IO window.
+				The default value is 256 bytes.
+		hpmemsize	The fixed amount of bus space which is
+				reserved for hotplug bridge's memory window.
+				The default value is 2 megabytes.
 		resource_alignment=
 				Format:
 				[<order of align>@][<domain>:]<bus>:<slot>.<func>[; ...]