vmbus: remove no longer used signal_policy

The explicit signal policy is no longer used. A different mechanism
will be added later when xmit_more is supported.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/hyperv.h

@@ -684,11 +684,6 @@ struct hv_input_signal_event_buffer {
 	struct hv_input_signal_event event;
 };
 
-enum hv_signal_policy {
-	HV_SIGNAL_POLICY_DEFAULT = 0,
-	HV_SIGNAL_POLICY_EXPLICIT,
-};
-
 enum hv_numa_policy {
 	HV_BALANCED = 0,
 	HV_LOCALIZED,
@@ -850,13 +845,6 @@ struct vmbus_channel {
 	 * link up channels based on their CPU affinity.
 	 */
 	struct list_head percpu_list;
-	/*
-	 * Host signaling policy: The default policy will be
-	 * based on the ring buffer state. We will also support
-	 * a policy where the client driver can have explicit
-	 * signaling control.
-	 */
-	enum hv_signal_policy  signal_policy;
 	/*
 	 * On the channel send side, many of the VMBUS
 	 * device drivers explicity serialize access to the
@@ -918,12 +906,6 @@ static inline bool is_hvsock_channel(const struct vmbus_channel *c)
 		  VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER);
 }
 
-static inline void set_channel_signal_state(struct vmbus_channel *c,
-					    enum hv_signal_policy policy)
-{
-	c->signal_policy = policy;
-}
-
 static inline void set_channel_affinity_state(struct vmbus_channel *c,
 					      enum hv_numa_policy policy)
 {