tracing: Fix initialization failure path in tracing_set_tracer()

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If tracer->init() fails, current code will leave current_tracer pointing
to an unusable tracer, which at best makes 'current_tracer' report
inaccurate value.

Fix the issue by pointing current_tracer to nop tracer, and only update
current_tracer with the new one after all the initialization succeeds.

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Anton Vorontsov 2012-07-09 17:10:39 -07:00 • committed by Greg Kroah-Hartman

parent c1743cbc8d

commit b2ad368beb

1 changed files with 4 additions and 3 deletions

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kernel/trace/trace.c

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