netlink: Rename pid to portid to avoid confusion

It is a frequent mistake to confuse the netlink port identifier with a
process identifier.  Try to reduce this confusion by renaming fields
that hold port identifiers portid instead of pid.

I have carefully avoided changing the structures exported to
userspace to avoid changing the userspace API.

I have successfully built an allyesconfig kernel with this change.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index 0da6877..c7425f3 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -286,7 +286,7 @@
 	upcall.cmd = OVS_PACKET_CMD_ACTION;
 	upcall.key = &OVS_CB(skb)->flow->key;
 	upcall.userdata = NULL;
-	upcall.pid = 0;
+	upcall.portid = 0;
 
 	for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
 		 a = nla_next(a, &rem)) {
@@ -296,7 +296,7 @@
 			break;
 
 		case OVS_USERSPACE_ATTR_PID:
-			upcall.pid = nla_get_u32(a);
+			upcall.portid = nla_get_u32(a);
 			break;
 		}
 	}