[PATCH 4/5] fix "trace-cmd reset" command to restore the default value of set_event_pid

[Tzvetomir Stoyanov <tstoyanov@vmware.com>]

The "trace-cmd reset" command should restore ftrace to its default state.
This patch sets "tracing/set_event_pid" to an empty string,
when the "trace-cmd reset" command is executed.

Signed-off-by: Tzvetomir Stoyanov <tstoyanov@vmware.com>
---
 tracecmd/trace-record.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index 38d9871..f77e49a 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -3761,6 +3761,15 @@ static void reset_clock(void)
 		write_instance_file(instance, "trace_clock", "local", "clock");
 }
 
+static void reset_event_pid(void)
+{
+	struct buffer_instance *instance;
+
+	for_all_instances(instance)
+		write_instance_file(instance, "set_event_pid", "", "event_pid");
+}
+
+
 static void clear_triggers(void)
 {
 	struct buffer_instance *instance;
@@ -4464,6 +4473,7 @@ void trace_reset(int argc, char **argv)
 	clear_triggers();
 	/* set clock to "local" */
 	reset_clock();
+	reset_event_pid();
 	tracecmd_remove_instances();
 	clear_func_filters();
 	/* restore tracing_on to 1 */
-- 
2.19.2