# \[PATCH 03/11\] UAPI: virtio\_net: Fix use of C++ keywords as structural members \[ver \#2\]

- From: David Howells \<dhowells@redhat.com\>
- Date: 2018-09-06 09:18:49 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2018/09/5373379
- Thread: https://ratatoskr.run/linux-api/2018/09/143352/t.md

```text
The virtio_net_ctrl_hdr struct uses a C++ keyword as structural members.  Fix
this by inserting an anonymous union that provides an alternative name and
then hide the reserved name in C++.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: "Michael S. Tsirkin" <mst@redhat.com>
cc: Jason Wang <redacted>
cc: <redacted>
---

 include/uapi/linux/virtio_net.h |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h
index a3715a3224c1..967142bc0e05 100644
--- a/include/uapi/linux/virtio_net.h
+++ b/include/uapi/linux/virtio_net.h
@@ -150,7 +150,12 @@ struct virtio_net_hdr_mrg_rxbuf {
  * command goes in between.
  */
 struct virtio_net_ctrl_hdr {
-	__u8 class;
+	union {
+#ifndef __cplusplus
+		__u8 class;
+#endif
+		__u8 _class;
+	};
 	__u8 cmd;
 } __attribute__((packed));
 
```