From: Jiri Olsa on

I'm sending reworked version of the graph output support for
preemptirqsoff/preemptoff/irqsoff tracers.

I made the graph output as an output event, so it could be shared
within tracers - patch 1/4.

I also added raw trace output for graph tracer. I have this one around
for long time and it was quite handy for investigating graph tracer issues.
(patch 4/4)

attached patches:
- 1/4 adding ftrace events for graph tracer
- 2/4 graph output support for irqsoff tracer
- 3/4 graph output support for preemptirqsoff/preemptoff tracers
- 4/4 raw output for graph tracer

kernel/trace/trace.c | 2 +-
kernel/trace/trace.h | 11 ++-
kernel/trace/trace_functions_graph.c | 117 +++++++++++++++++++----
kernel/trace/trace_irqsoff.c | 174 ++++++++++++++++++++++++++++++++--
4 files changed, 277 insertions(+), 27 deletions(-)
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