The following reply was made to PR port-amd64/37043; it has been noted by GNATS.

From: Pavel Cahyna <pavel@netbsd.org>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: PR/37043 CVS commit: src/sys/arch/x86/x86
Date: Fri, 19 Oct 2007 21:34:56 +0000 (UTC)

 Module Name:	src
 Committed By:	pavel
 Date:		Fri Oct 19 21:34:56 UTC 2007
 
 Modified Files:
 	src/sys/arch/x86/x86: mtrr_i686.c
 
 Log Message:
 The control registers (notably CR3 and CR4) are 64-bit on amd64 (see
 "AMD64 Architecture Programmer's Manual"). Declare the variables
 holding them as vaddr_t, otherwise the upper bits are lost.
 
 (CR0 is actually 64-bit too, but the upper bits are unused, so I am
 not changing it now.)
 
 Should fix the reboot caused by X11. From Arto Huusko in
 PR port-amd64/37043.
 
 
 To generate a diff of this commit:
 cvs rdiff -r1.11 -r1.12 src/sys/arch/x86/x86/mtrr_i686.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.