From 60e15726afa57e90c754a1a4fb1ce9e2c2b8aec0 Mon Sep 17 00:00:00 2001
From: Alan Cox <alc@FreeBSD.org>
Date: Fri, 12 Jul 2002 02:55:55 +0000
Subject: [PATCH]  o Lock accesses to the page queues.

---
 sys/vm/device_pager.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/vm/device_pager.c b/sys/vm/device_pager.c
index 890d0681695..e7acedcdbfb 100644
--- a/sys/vm/device_pager.c
+++ b/sys/vm/device_pager.c
@@ -226,9 +226,10 @@ dev_pager_getpages(object, m, count, reqpage)
 	 */
 	page = dev_pager_getfake(paddr);
 	TAILQ_INSERT_TAIL(&object->un_pager.devp.devp_pglist, page, pageq);
-	for (i = 0; i < count; i++) {
+	vm_page_lock_queues();
+	for (i = 0; i < count; i++)
 		vm_page_free(m[i]);
-	}
+	vm_page_unlock_queues();
 	vm_page_insert(page, object, offset);
 
 	return (VM_PAGER_OK);