[PATCH 13/18 v2] powerpc: hvc enablement for CMO

[Robert Jennings]

From: Robert Jennings <rcj at linux.vnet.ibm.com>

Define a get_io_entitlement function so that it can function in a
Cooperative Memory Overcommitment (CMO) environment (it returns 0 to
indicate that no IO entitlement is required, as the driver does not
perform DMA operations).

Signed-off-by: Robert Jennings <rcj at linux.vnet.ibm.com>

---
 drivers/char/hvc_vio.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: b/drivers/char/hvc_vio.c
===================================================================
--- a/drivers/char/hvc_vio.c
+++ b/drivers/char/hvc_vio.c
@@ -82,6 +82,11 @@ static struct hv_ops hvc_get_put_ops = {
 	.put_chars = hvc_put_chars,
 };
 
+unsigned long hvc_io_entitlement(struct vio_dev *vdev)
+{
+	return 0;
+}
+
 static int __devinit hvc_vio_probe(struct vio_dev *vdev,
 				const struct vio_device_id *id)
 {
@@ -111,6 +116,7 @@ static struct vio_driver hvc_vio_driver 
 	.id_table	= hvc_driver_table,
 	.probe		= hvc_vio_probe,
 	.remove		= hvc_vio_remove,
+	.get_io_entitlement = hvc_io_entitlement,
 	.driver		= {
 		.name	= hvc_driver_name,
 		.owner	= THIS_MODULE,