From 79f6ebe2337e1c5a701f0c740b3b9b04d5529d14 Mon Sep 17 00:00:00 2001
From: Alan Cox <alc@FreeBSD.org>
Date: Sat, 28 Nov 2009 00:50:09 +0000
Subject: [PATCH] Properly synchronize the previous change.

---
 sys/vm/vm_fault.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/vm/vm_fault.c b/sys/vm/vm_fault.c
index f1f13a64021b..0a5a4125bef4 100644
--- a/sys/vm/vm_fault.c
+++ b/sys/vm/vm_fault.c
@@ -761,8 +761,10 @@ RetryFault:;
 				fs.first_m->valid = VM_PAGE_BITS_ALL;
 				if (wired && (fault_flags &
 				    VM_FAULT_CHANGE_WIRING) == 0) {
+					vm_page_lock_queues();
 					vm_page_wire(fs.first_m);
 					vm_page_unwire(fs.m, FALSE);
+					vm_page_unlock_queues();
 				}
 				/*
 				 * We no longer need the old page or object.