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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-03-19 20:26:14 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-20 10:17:06 +0100 |
| commit | 28bea271e58e429eccfad3d7ee2ad12d6ee015bf (patch) | |
| tree | 00b5cf70bf147e7fad3b438835d21b093a2b9c28 /kernel/trace/trace_output.c | |
| parent | 23725aeeab10ba02bcf10ec49ad73146b54cb52f (diff) | |
| download | linux-28bea271e58e429eccfad3d7ee2ad12d6ee015bf.tar.bz2 | |
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>
Diffstat (limited to 'kernel/trace/trace_output.c')
| -rw-r--r-- | kernel/trace/trace_output.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index b45141748af5..19261fdd2455 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -481,6 +481,11 @@ int register_ftrace_event(struct trace_event *event) 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) { |