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tracing: Remove redundant reset per-CPU buff in irqsoff tracer 

There is no reason to do it twice: from commit b6f11df26f
("trace: Call tracing_reset_online_cpus before tracer->init()")
resetting of per-CPU buffers done before tracer->init() call.

tracer->init() calls {irqs,preempt,preemptirqs}off_tracer_init() and it
calls __irqsoff_tracer_init(), which resets per-CPU ringbuffer second
time.
It's slowpath, but anyway.

Link: http://lkml.kernel.org/r/1445278226-16187-1-git-send-email-0x7f454c46@gmail.com

Signed-off-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
hifive-unleashed-5.1
Dmitry Safonov 2015-10-19 21:10:26 +03:00 committed by Steven Rostedt
parent 9d2099ab05
commit 741f3a69f1
1 changed files with 0 additions and 1 deletions
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kernel/trace/trace_irqsoff.c
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@ -626,7 +626,6 @@ static int __irqsoff_tracer_init(struct trace_array *tr)
irqsoff_trace = tr;
/* make sure that the tracer is visible */
smp_wmb();
tracing_reset_online_cpus(&tr->trace_buffer);
ftrace_init_array_ops(tr, irqsoff_tracer_call);