workqueue: add function in event of workqueue_activate_work

The trace event "workqueue_activate_work" only print work struct.
However, function is the region of interest in a full sequence of work.
Current workqueue_activate_work trace event output:

    workqueue_activate_work: work struct ffffff88b4a0f450

With this change, workqueue_activate_work will print the function name,
align with workqueue_queue_work/execute_start/execute_end event.

    workqueue_activate_work: work struct ffffff80413a78b8 function=vmstat_update

Signed-off-by: Kassey Li <quic_yingangl@quicinc.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/include/trace/events/workqueue.h b/include/trace/events/workqueue.h
index 262d52021c236c492d8fc92a70f54d3a351ca20d..6ef5b7254070314fd053ed789e8093453355bee7 100644 (file)
--- a/include/trace/events/workqueue.h
+++ b/include/trace/events/workqueue.h
@@ -64,13 +64,15 @@ TRACE_EVENT(workqueue_activate_work,
 
        TP_STRUCT__entry(
                __field( void *,        work    )
+               __field( void *,        function)
        ),
 
        TP_fast_assign(
                __entry->work           = work;
+               __entry->function       = work->func;
        ),
 
-       TP_printk("work struct %p", __entry->work)
+       TP_printk("work struct %p function=%ps ", __entry->work, __entry->function)
 );
 
 /**