From 239169b1e780fa0b3a1483f5020d4c0c8735c4ff Mon Sep 17 00:00:00 2001
From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Thu, 2 Dec 2010 18:37:34 +0000
Subject: [PATCH] Document loader tunable hw.re.prefer_iomap.

---
 share/man/man4/re.4 | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/share/man/man4/re.4 b/share/man/man4/re.4
index d4a39ce1f669..98a0f3a0c42a 100644
--- a/share/man/man4/re.4
+++ b/share/man/man4/re.4
@@ -30,7 +30,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 27, 2010
+.Dd December 2, 2010
 .Dt RE 4
 .Os
 .Sh NAME
@@ -178,6 +178,11 @@ prompt before booting the kernel or stored in
 .It Va hw.re.msi_disable
 This tunable disables MSI support on the Ethernet hardware.
 The default value is 0.
+.It Va hw.re.prefer_iomap
+This tunable controls which register mapping should be used on the
+specified device.
+A non-zero value enables I/O space register mapping.
+The default value is 0 to use memory space register mapping.
 .El
 .Sh DIAGNOSTICS
 .Bl -diag