Index: /trunk/src/VBox/Additions/linux/drm/vbox_fb.c
===================================================================
--- /trunk/src/VBox/Additions/linux/drm/vbox_fb.c	(revision 61601)
+++ /trunk/src/VBox/Additions/linux/drm/vbox_fb.c	(revision 61602)
@@ -163,4 +163,5 @@
 }
 
+#ifdef CONFIG_FB_DEFERRED_IO
 static void vbox_deferred_io(struct fb_info *info,
                              struct list_head *pagelist)
@@ -194,4 +195,5 @@
         .deferred_io    = vbox_deferred_io,
 };
+#endif
 
 static void vbox_fillrect(struct fb_info *info,
@@ -357,6 +359,8 @@
     info->screen_size = size;
 
+#ifdef CONFIG_FB_DEFERRED_IO
     info->fbdefio = &vbox_defio;
     fb_deferred_io_init(info);
+#endif
 
     info->pixmap.flags = FB_PIXMAP_SYSTEM;