In kernel 4.17, pci_get_bus_and_slot() has been removed in favor of
pci_get_domain_bus_and_slot(). It appears that VirtualBox only uses
domain number 0, thus pci_get_domain_bus_and_slot(0, bus, devfn)
is a suitable replacement for pci_get_bus_and_slot(bus, devfn).

The resulting code compiles; however, I do not use PCI passthru, which
I think means that I have not actually tested the code.

This patch released under a combined MIT/GPLv2 license.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>

Index: VirtualBox-5.2.12/src/VBox/Additions/linux/drm/vbox_ttm.c
===================================================================
--- VirtualBox-5.2.12.orig/src/VBox/Additions/linux/drm/vbox_ttm.c
+++ VirtualBox-5.2.12/src/VBox/Additions/linux/drm/vbox_ttm.c
@@ -208,10 +208,15 @@ static struct ttm_backend_func vbox_tt_b
 	.destroy = &vbox_ttm_backend_destroy,
 };
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 17, 0)
+static struct ttm_tt *vbox_ttm_tt_create(struct ttm_buffer_object *bo,
+					 u32 page_flags)
+#else
 static struct ttm_tt *vbox_ttm_tt_create(struct ttm_bo_device *bdev,
 					 unsigned long size,
 					 u32 page_flags,
 					 struct page *dummy_read_page)
+#endif
 {
 	struct ttm_tt *tt;
 
@@ -220,7 +225,11 @@ static struct ttm_tt *vbox_ttm_tt_create
 		return NULL;
 
 	tt->func = &vbox_tt_backend_func;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 17, 0)
+	if (ttm_tt_init(tt, bo, page_flags)) {
+#else
 	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+#endif
 		kfree(tt);
 		return NULL;
 	}
@@ -401,7 +410,11 @@ int vbox_bo_create(struct drm_device *de
 
 	ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
 			  ttm_bo_type_device, &vboxbo->placement,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 17, 0)
+			  align >> PAGE_SHIFT, false, acc_size,
+#else
 			  align >> PAGE_SHIFT, false, NULL, acc_size,
+#endif
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0) || defined(RHEL_73)
 			  NULL,
 #endif