diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c
index 0a7a667..875d019 100644
--- a/drivers/video/fb_defio.c
+++ b/drivers/video/fb_defio.c
@@ -144,7 +144,9 @@
 static int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma)
 {
 	vma->vm_ops = &fb_deferred_io_vm_ops;
-	vma->vm_flags |= ( VM_IO | VM_RESERVED | VM_DONTEXPAND );
+	vma->vm_flags |= ( VM_RESERVED | VM_DONTEXPAND );
+	if (!(info->flags & FBINFO_VIRTFB))
+		vma->vm_flags |= VM_IO;
 	vma->vm_private_data = info;
 	return 0;
 }
diff --git a/include/linux/fb.h b/include/linux/fb.h
index f847df9..6e8ebf7 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -768,6 +768,7 @@
 	 *  takes over; acceleration engine should be in a quiescent state */
 
 /* hints */
+#define FBINFO_VIRTFB		0x0004 /* FB is System RAM, not device. */
 #define FBINFO_PARTIAL_PAN_OK	0x0040 /* otw use pan only for double-buffering */
 #define FBINFO_READS_FAST	0x0080 /* soft-copy faster than rendering */