From b47228854f604dd0263a3545a17c7b02eb430d8b Mon Sep 17 00:00:00 2001
From: Ed Maste <emaste@FreeBSD.org>
Date: Tue, 22 Jul 2014 13:58:33 +0000
Subject: [PATCH] Don't pass null kmdp to preload_search_info

On Xen PVH guests kmdp == NULL.

Submitted by:	royger
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
---
 sys/amd64/amd64/machdep.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index 5afd58cd685..f02045d6414 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -1958,8 +1958,8 @@ hammer_time(u_int64_t modulep, u_int64_t physfree)
 	 * Use vt(4) by default for UEFI boot (during the sc(4)/vt(4)
 	 * transition).
 	 */
-	if (preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_EFI_MAP) !=
-	    NULL)
+	if (kmdp != NULL && preload_search_info(kmdp,
+	    MODINFO_METADATA | MODINFOMD_EFI_MAP) != NULL)
 		vty_set_preferred(VTY_VT);
 
 	/*