Index: sys/dev/drm2/i915/i915_gem.c
===================================================================
--- sys/dev/drm2/i915/i915_gem.c
+++ sys/dev/drm2/i915/i915_gem.c
@@ -1475,7 +1475,7 @@
 
 static int
 i915_gem_pager_fault(vm_object_t vm_obj, vm_ooffset_t offset, int prot,
-    vm_page_t *mres)
+    vm_page_t *mres, int count, int *rahead)
 {
 	struct drm_gem_object *gem_obj = vm_obj->handle;
 	struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);
@@ -1490,6 +1490,9 @@
 #endif /* FREEBSD_WIP */
 	bool pinned;
 
+	if (rahead)
+		*rahead = 0;
+
 	vm_object_pip_add(vm_obj, 1);
 
 	/*
Index: sys/dev/drm2/ttm/ttm_bo_vm.c
===================================================================
--- sys/dev/drm2/ttm/ttm_bo_vm.c
+++ sys/dev/drm2/ttm/ttm_bo_vm.c
@@ -100,7 +100,7 @@
 
 static int
 ttm_bo_vm_fault(vm_object_t vm_obj, vm_ooffset_t offset,
-    int prot, vm_page_t *mres)
+    int prot, vm_page_t *mres, int count, int *rahead)
 {
 
 	struct ttm_buffer_object *bo = vm_obj->handle;
@@ -112,6 +112,9 @@
 	struct ttm_mem_type_manager *man =
 		&bdev->man[bo->mem.mem_type];
 
+	if (rahead)
+		*rahead = 0;
+
 	vm_object_pip_add(vm_obj, 1);
 	if (*mres != NULL) {
 		vm_page_lock(*mres);
Index: sys/dev/netmap/netmap_freebsd.c
===================================================================
--- sys/dev/netmap/netmap_freebsd.c
+++ sys/dev/netmap/netmap_freebsd.c
@@ -492,7 +492,7 @@
 
 static int
 netmap_dev_pager_fault(vm_object_t object, vm_ooffset_t offset,
-	int prot, vm_page_t *mres)
+	int prot, vm_page_t *mres, int count, int *rahead)
 {
 	struct netmap_vm_handle_t *vmh = object->handle;
 	struct netmap_priv_d *priv = vmh->priv;
@@ -502,6 +502,9 @@
 	vm_memattr_t memattr;
 	vm_pindex_t pidx;
 
+	if (rahead)
+		*rahead = 0;
+
 	ND("object %p offset %jd prot %d mres %p",
 			object, (intmax_t)offset, prot, mres);
 	memattr = object->memattr;
Index: sys/dev/xen/privcmd/privcmd.c
===================================================================
--- sys/dev/xen/privcmd/privcmd.c
+++ sys/dev/xen/privcmd/privcmd.c
@@ -90,7 +90,7 @@
     vm_ooffset_t foff, struct ucred *cred, u_short *color);
 static void privcmd_pg_dtor(void *handle);
 static int privcmd_pg_fault(vm_object_t object, vm_ooffset_t offset,
-    int prot, vm_page_t *mres);
+    int prot, vm_page_t *mres, int count, int *rahead);
 
 static struct cdev_pager_ops privcmd_pg_ops = {
 	.cdev_pg_fault = privcmd_pg_fault,
@@ -151,12 +151,15 @@
 
 static int
 privcmd_pg_fault(vm_object_t object, vm_ooffset_t offset,
-    int prot, vm_page_t *mres)
+    int prot, vm_page_t *mres, int count, int *rahead)
 {
 	struct privcmd_map *map = object->handle;
 	vm_pindex_t pidx;
 	vm_page_t page, oldm;
 
+	if (rahead)
+		*rahead = 0;
+
 	if (map->mapped != true)
 		return (VM_PAGER_FAIL);
 
Index: sys/vm/device_pager.c
===================================================================
--- sys/vm/device_pager.c
+++ sys/vm/device_pager.c
@@ -90,7 +90,7 @@
     vm_ooffset_t foff, struct ucred *cred, u_short *color);
 static void old_dev_pager_dtor(void *handle);
 static int old_dev_pager_fault(vm_object_t object, vm_ooffset_t offset,
-    int prot, vm_page_t *mres);
+    int prot, vm_page_t *mres, int count, int *rahead);
 
 static struct cdev_pager_ops old_dev_pager_ops = {
 	.cdev_pg_ctor =	old_dev_pager_ctor,
@@ -265,8 +265,13 @@
 	/* Since our haspage reports zero after/before, the count is 1. */
 	KASSERT(count == 1, ("%s: count %d", __func__, count));
 	VM_OBJECT_ASSERT_WLOCKED(object);
+	if (object->type == OBJT_DEVICE) {
+		count = 1;
+		if (rahead)
+			*rahead = 0;
+	}
 	error = object->un_pager.devp.ops->cdev_pg_fault(object,
-	    IDX_TO_OFF(ma[0]->pindex), PROT_READ, &ma[0]);
+	    IDX_TO_OFF(ma[0]->pindex), PROT_READ, ma, count, rahead);
 
 	VM_OBJECT_ASSERT_WLOCKED(object);
 
@@ -282,8 +287,6 @@
 		}
 		if (rbehind)
 			*rbehind = 0;
-		if (rahead)
-			*rahead = 0;
 	}
 
 	return (error);
@@ -291,7 +294,7 @@
 
 static int
 old_dev_pager_fault(vm_object_t object, vm_ooffset_t offset, int prot,
-    vm_page_t *mres)
+    vm_page_t *mres, int count, int *rahead)
 {
 	vm_paddr_t paddr;
 	vm_page_t m_paddr, page;
@@ -302,6 +305,9 @@
 	vm_memattr_t memattr, memattr1;
 	int ref, ret;
 
+	if (rahead)
+		*rahead = 0;
+
 	memattr = object->memattr;
 
 	VM_OBJECT_WUNLOCK(object);
Index: sys/vm/vm_pager.h
===================================================================
--- sys/vm/vm_pager.h
+++ sys/vm/vm_pager.h
@@ -176,7 +176,7 @@
 
 struct cdev_pager_ops {
 	int (*cdev_pg_fault)(vm_object_t vm_obj, vm_ooffset_t offset,
-	    int prot, vm_page_t *mres);
+	    int prot, vm_page_t *mres, int count, int *rahead);
 	int (*cdev_pg_ctor)(void *handle, vm_ooffset_t size, vm_prot_t prot,
 	    vm_ooffset_t foff, struct ucred *cred, u_short *color);
 	void (*cdev_pg_dtor)(void *handle);