hv: delete vmbus_get_debug_info()

It's only used once, only contains 2 function calls, so just make those
calls directly, deleting the function, and the now unneeded structure
entirely.
Tested-by: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hv/channel.c

@@ -59,16 +59,6 @@ static void vmbus_setevent(struct vmbus_channel *channel)
 	}
 }
 
-/*
- * vmbus_get_debug_info -Retrieve various channel debug info
- */
-void vmbus_get_debug_info(struct vmbus_channel *channel,
-			      struct vmbus_channel_debug_info *debuginfo)
-{
-	hv_ringbuffer_get_debuginfo(&channel->inbound, &debuginfo->inbound);
-	hv_ringbuffer_get_debuginfo(&channel->outbound, &debuginfo->outbound);
-}
-
 /*
  * vmbus_open - Open the specified channel.
  */

drivers/hv/vmbus_drv.c

@@ -63,29 +63,26 @@ static int vmbus_exists(void)
 static void get_channel_info(struct hv_device *device,
 			     struct hv_device_info *info)
 {
-	struct vmbus_channel_debug_info debug_info;
+	struct hv_ring_buffer_debug_info inbound;
+	struct hv_ring_buffer_debug_info outbound;
 
 	if (!device->channel)
 		return;
 
-	vmbus_get_debug_info(device->channel, &debug_info);
-
-	info->inbound.int_mask = debug_info.inbound.current_interrupt_mask;
-	info->inbound.read_idx = debug_info.inbound.current_read_index;
-	info->inbound.write_idx = debug_info.inbound.current_write_index;
-	info->inbound.bytes_avail_toread =
-		debug_info.inbound.bytes_avail_toread;
-	info->inbound.bytes_avail_towrite =
-		debug_info.inbound.bytes_avail_towrite;
-
-	info->outbound.int_mask =
-		debug_info.outbound.current_interrupt_mask;
-	info->outbound.read_idx = debug_info.outbound.current_read_index;
-	info->outbound.write_idx = debug_info.outbound.current_write_index;
-	info->outbound.bytes_avail_toread =
-		debug_info.outbound.bytes_avail_toread;
-	info->outbound.bytes_avail_towrite =
-		debug_info.outbound.bytes_avail_towrite;
+	hv_ringbuffer_get_debuginfo(&device->channel->inbound, &inbound);
+	hv_ringbuffer_get_debuginfo(&device->channel->outbound, &outbound);
+
+	info->inbound.int_mask = inbound.current_interrupt_mask;
+	info->inbound.read_idx = inbound.current_read_index;
+	info->inbound.write_idx = inbound.current_write_index;
+	info->inbound.bytes_avail_toread = inbound.bytes_avail_toread;
+	info->inbound.bytes_avail_towrite = inbound.bytes_avail_towrite;
+
+	info->outbound.int_mask = outbound.current_interrupt_mask;
+	info->outbound.read_idx = outbound.current_read_index;
+	info->outbound.write_idx = outbound.current_write_index;
+	info->outbound.bytes_avail_toread = outbound.bytes_avail_toread;
+	info->outbound.bytes_avail_towrite = outbound.bytes_avail_towrite;
 }
 
 #define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2)

include/linux/hyperv.h

@@ -899,11 +899,6 @@ enum vmbus_channel_state {
 	CHANNEL_OPENED_STATE,
 };
 
-struct vmbus_channel_debug_info {
-	struct hv_ring_buffer_debug_info inbound;
-	struct hv_ring_buffer_debug_info outbound;
-};
-
 /*
  * Represents each channel msg on the vmbus connection This is a
  * variable-size data structure depending on the msg type itself
@@ -1169,9 +1164,6 @@ extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
 				     u64 *requestid);
 
 
-extern void vmbus_get_debug_info(struct vmbus_channel *channel,
-				     struct vmbus_channel_debug_info *debug);
-
 extern void vmbus_ontimer(unsigned long data);
 
 struct hv_dev_port_info {