[PATCH 2/2] trace-cmd: Reset CPU mask to its default value with "trace-cmd reset".

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

"trace-cmd reset" command should put all ftrace config to its default
state, but trace cpumask was not reseted. The patch sets cpumask to
its default value - all CPUs are enabled for tracing.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 tracecmd/trace-record.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index 69de82a..c41f55f 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -4096,6 +4096,24 @@ static void reset_clock(void)
 		write_instance_file(instance, "trace_clock", "local", "clock");
 }
 
+static void reset_cpu_mask(void)
+{
+	char str[24];
+	int cpumask = 0;
+	int cpus = count_cpus();
+	struct buffer_instance *instance;
+
+	while (cpus--) {
+		cpumask <<= 1;
+		cpumask |= 1;
+	}
+	if (snprintf(str, 24, "%x", cpumask) <= 0)
+		return;
+
+	for_all_instances(instance)
+		write_instance_file(instance, "tracing_cpumask", str, "cpumask");
+}
+
 static void reset_event_pid(void)
 {
 	add_event_pid("");
@@ -4808,6 +4826,7 @@ void trace_reset(int argc, char **argv)
 	reset_clock();
 	reset_event_pid();
 	reset_max_latency_instance();
+	reset_cpu_mask();
 	tracecmd_remove_instances();
 	clear_func_filters();
 	/* restore tracing_on to 1 */
-- 
2.21.0