tracing/ftrace: make nop tracer reset previous entries
If nop tracer is selected, some old entries from the previous tracer
could still be enqueued. Tracing have to be reset.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Steven Noonan <steven@uplinklabs.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/trace/trace_nop.c b/kernel/trace/trace_nop.c
index dafaefb..9fb02c1 100644
--- a/kernel/trace/trace_nop.c
+++ b/kernel/trace/trace_nop.c
@@ -26,8 +26,12 @@
static void nop_trace_init(struct trace_array *tr)
{
+ int cpu;
ctx_trace = tr;
+ for_each_online_cpu(cpu)
+ tracing_reset(tr->data[cpu]);
+
if (tr->ctrl)
start_nop_trace(tr);
}