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| author |   Steven Rostedt <srostedt@redhat.com> | 2009-08-27 16:52:21 -0400 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2009-08-27 16:58:05 -0400 |
| commit | 5d4a9dba2d7fbab69f00dedd430d1788834a055a (patch) | |
| tree | a57ec209fc1ac86d7acbd67164b068ecdadd6317 /kernel/trace/trace.h | |
| parent | tracing: remove legacy select of MARKERS by context switch tracing (diff) | |
| download | linux-dev-5d4a9dba2d7fbab69f00dedd430d1788834a055a.tar.xz linux-dev-5d4a9dba2d7fbab69f00dedd430d1788834a055a.zip | |
tracing: only show tracing_max_latency when latency tracer configured
The tracing_max_latency file should only be present when one of the
latency tracers ({preempt|irqs}off, wakeup*) are enabled.
This patch also removes tracing_thresh when latency tracers are not
enabled, as well as compiles out code that is only used for latency
tracers.
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 654fd657bd03..e2c06b21dd82 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -473,12 +473,14 @@ void unregister_tracer(struct tracer *type); extern unsigned long nsecs_to_usecs(unsigned long nsecs); +#ifdef CONFIG_TRACER_MAX_TRACE extern unsigned long tracing_max_latency; extern unsigned long tracing_thresh; void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); void update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu); +#endif /* CONFIG_TRACER_MAX_TRACE */ #ifdef CONFIG_STACKTRACE void ftrace_trace_stack(struct trace_array *tr, unsigned long flags, |