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| author |   Dmitry Safonov <0x7f454c46@gmail.com> | 2015-10-19 21:10:26 +0300 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2016-03-18 16:39:11 -0400 |
| commit | 741f3a69f101250dc6b171b88e14ea51b099b1a9 (patch) | |
| tree | 1dd4253e10c879854b82f5a9eb7c00a2d68a8e93 /kernel | |
| parent | x86: ftrace: Fix the misleading comment for arch/x86/kernel/ftrace.c (diff) | |
| download | linux-dev-741f3a69f101250dc6b171b88e14ea51b099b1a9.tar.xz linux-dev-741f3a69f101250dc6b171b88e14ea51b099b1a9.zip | |
tracing: Remove redundant reset per-CPU buff in irqsoff tracer
There is no reason to do it twice: from commit b6f11df26fdc28
("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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_irqsoff.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c index be3222b7d72e..03cdff84d026 100644 --- a/kernel/trace/trace_irqsoff.c +++ b/kernel/trace/trace_irqsoff.c @@ -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); |