ftrace: ensure every event gets an id
Impact: widen user-space visibe event IDs to all events
Previously only TRACE_EVENT events got ids, because only they
generated raw output which needs to be demuxed from the trace.
In order to provide a unique ID for each event, register everybody,
regardless.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <20090319194233.464914218@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index b451417..19261fd 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -481,6 +481,11 @@
mutex_lock(&trace_event_mutex);
+ if (!event) {
+ ret = next_event_type++;
+ goto out;
+ }
+
if (!event->type)
event->type = next_event_type++;
else if (event->type > __TRACE_LAST_TYPE) {