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authorDmitry Safonov <0x7f454c46@gmail.com>2015-10-19 21:10:26 +0300
committerSteven Rostedt <rostedt@goodmis.org>2016-03-18 16:39:11 -0400
commit741f3a69f101250dc6b171b88e14ea51b099b1a9 (patch)
tree1dd4253e10c879854b82f5a9eb7c00a2d68a8e93 /kernel
parent9d2099ab054558af0b3d4860b68a11aff420aa40 (diff)
downloadlinux-741f3a69f101250dc6b171b88e14ea51b099b1a9.tar.bz2
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.c1
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);