Added comment.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26806 a95241bf-73f2-0310-859d-f6bbb57e9c96
2008-08-04 21:45:50 +00:00 · 2008-08-04 21:45:50 +00:00 · 783c4e20b4
commit 783c4e20b4
parent a9ab16e27c
1 changed files with 3 additions and 0 deletions
--- 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;
 };