Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 741f3a69 authored by Dmitry Safonov's avatar Dmitry Safonov Committed by Steven Rostedt
Browse files

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

  There is no reason to do it twice: from commit b6f11df2
("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: default avatarDmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 9d2099ab

kernel/trace/trace_irqsoff.c

+0 −1
Original line number Diff line number Diff line
@@ -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);