[PATCH v2 02/16] hyper-v: trace vmbus_on_message()

[Vitaly Kuznetsov]

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

Signed-off-by: Vitaly Kuznetsov <vkuzn...@redhat.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 060df71c2e8b..ddeebba8971e 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -1170,6 +1170,8 @@ 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 82432e351724..4aac780099b4 100644
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -19,6 +19,11 @@ DEFINE_EVENT_PRINT(vmbus_hdr_msg, vmbus_on_msg_dpc,
        TP_ARGS(hdr),
        TP_printk("message %u received", __entry->msgtype));
 
+DEFINE_EVENT_PRINT(vmbus_hdr_msg, vmbus_on_message,
+        TP_PROTO(const struct vmbus_channel_message_header *hdr),
+        TP_ARGS(hdr),
+        TP_printk("processing message %u", __entry->msgtype));
+
 #undef TRACE_INCLUDE_PATH
 #define TRACE_INCLUDE_PATH .
 #undef TRACE_INCLUDE_FILE
-- 
2.13.5