[PATCH 02/17] hyper-v: trace vmbus_on_message()

[kys at exchange.microsoft.com]

From: Vitaly Kuznetsov <vkuznets at redhat.com>

Add tracepoint to vmbus_on_message() which is called when we start
processing a blocking from work context.

Signed-off-by: Vitaly Kuznetsov <vkuznets at redhat.com>
Signed-off-by: K. Y. Srinivasan <kys at microsoft.com>
---
 drivers/hv/channel_mgmt.c | 2 ++
 drivers/hv/hv_trace.h     | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index a8dc9a164631..71d4d68488d4 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -1176,6 +1176,8 @@ void vmbus_onmessage(void *context)
 	hdr = (struct vmbus_channel_message_header *)msg->u.payload;
 	size = msg->header.payload_size;
 
+	trace_vmbus_on_message(hdr);
+
 	if (hdr->msgtype >= CHANNELMSG_COUNT) {
 		pr_err("Received invalid channel message type %d size %d\n",
 			   hdr->msgtype, size);
diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h
index 9c2772922c76..d432aba5df8a 100644
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -19,6 +19,11 @@ DEFINE_EVENT(vmbus_hdr_msg, vmbus_on_msg_dpc,
 	TP_ARGS(hdr)
 );
 
+DEFINE_EVENT(vmbus_hdr_msg, vmbus_on_message,
+	TP_PROTO(const struct vmbus_channel_message_header *hdr),
+	TP_ARGS(hdr)
+);
+
 #undef TRACE_INCLUDE_PATH
 #define TRACE_INCLUDE_PATH .
 #undef TRACE_INCLUDE_FILE
-- 
2.14.1