[PATCH] virtio: don't expose u16 in userspace api

[Stephen Hemminger]

Programs using virtio headers outside of kernel will no longer
build because u16 type does not exist in userspace. All user ABI
must use __u16 typedef instead.

Bug introduce by:
  commit 986a4f4d452dec004697f667439d27c3fda9c928
  Author: Jason Wang <jasowang@xxxxxxxxxx>
  Date:   Fri Dec 7 07:04:56 2012 +0000

    virtio_net: multiqueue support

Signed-off-by: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>

---
Patch against -net but should go to stable for 3.9.1

--- a/include/uapi/linux/virtio_net.h	2013-05-02 14:30:53.362557982 -0700
+++ b/include/uapi/linux/virtio_net.h	2013-05-03 17:44:06.028365521 -0700
@@ -191,7 +191,7 @@ struct virtio_net_ctrl_mac {
  * specified.
  */
 struct virtio_net_ctrl_mq {
-	u16 virtqueue_pairs;
+	__u16 virtqueue_pairs;
 };
 
 #define VIRTIO_NET_CTRL_MQ   4
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