tracing: make power tracer start/stop methods lighter weight

The start/stop methods of a tracer should be able to be executed
in all contexts. This patch converts the power tracer to do so.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/kernel/trace/trace_power.c b/kernel/trace/trace_power.c
index 91ce672fb037..bae791ebcc51 100644
--- a/kernel/trace/trace_power.c
+++ b/kernel/trace/trace_power.c
@@ -122,12 +122,16 @@ fail_start:
 static void start_power_trace(struct trace_array *tr)
 {
         trace_power_enabled = 1;
-        tracing_power_register();
 }
 
 static void stop_power_trace(struct trace_array *tr)
 {
         trace_power_enabled = 0;
+}
+
+static void power_trace_reset(struct trace_array *tr)
+{
+        trace_power_enabled = 0;
         unregister_trace_power_start(probe_power_start);
         unregister_trace_power_end(probe_power_end);
         unregister_trace_power_mark(probe_power_mark);
@@ -188,7 +192,7 @@ static struct tracer power_tracer __read_mostly =
         .init           = power_trace_init,
         .start          = start_power_trace,
         .stop           = stop_power_trace,
-        .reset          = stop_power_trace,
+        .reset          = power_trace_reset,
         .print_line     = power_print_line,
 };