From 783c4e20b44b7d78b9300e58a3e911fed018fd05 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Mon, 4 Aug 2008 21:45:50 +0000
Subject: [PATCH] Added comment.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26806 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 headers/private/kernel/arch/x86/arch_cpu.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/headers/private/kernel/arch/x86/arch_cpu.h b/headers/private/kernel/arch/x86/arch_cpu.h
index 48e34e7900..3054a20535 100644
--- a/headers/private/kernel/arch/x86/arch_cpu.h
+++ b/headers/private/kernel/arch/x86/arch_cpu.h
@@ -153,6 +153,9 @@ struct iframe {
 	uint32 eip;
 	uint32 cs;
 	uint32 flags;
+
+	// user_esp and user_ss are only present when the iframe is a userland
+	// iframe (IFRAME_IS_USER()). A kernel iframe is shorter.
 	uint32 user_esp;
 	uint32 user_ss;
 };