tracing: Clear all trace buffers when unloaded module event was used
Currently we do not know what buffer a module event was enabled in.
On unload, it is safest to clear all buffer instances, not just the
top level buffer.
Todo: Clear only the buffer that the event was used in. The
infrastructure is there to do this, but it makes the code a bit
more complex. Lets get the current code vetted before we add that.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index b5b25b6..c8a852a 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -912,9 +912,15 @@
tracing_reset(&global_trace, cpu);
}
-void tracing_reset_current_online_cpus(void)
+void tracing_reset_all_online_cpus(void)
{
- tracing_reset_online_cpus(&global_trace);
+ struct trace_array *tr;
+
+ mutex_lock(&trace_types_lock);
+ list_for_each_entry(tr, &ftrace_trace_arrays, list) {
+ tracing_reset_online_cpus(tr);
+ }
+ mutex_unlock(&trace_types_lock);
}
#define SAVED_CMDLINES 128