rps: cleanups

struct softnet_data holds many queues, so consistent use "sd" name
instead of "queue" is better.

Adds a rps_ipi_queued() helper to cleanup enqueue_to_backlog()

Adds a _and_irq_disable suffix to net_rps_action() name, as David
suggested.

incr_input_queue_head() becomes input_queue_head_incr()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 83ab3da..3c5ed5f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1401,10 +1401,10 @@
 	struct napi_struct	backlog;
 };
 
-static inline void incr_input_queue_head(struct softnet_data *queue)
+static inline void input_queue_head_incr(struct softnet_data *sd)
 {
 #ifdef CONFIG_RPS
-	queue->input_queue_head++;
+	sd->input_queue_head++;
 #endif
 }