From: Frederic Weisbecker Date: Fri, 31 Oct 2008 12:14:28 +0000 (+0100) Subject: tracing/ftrace: remove unused code in sched_switch tracer X-Git-Tag: firefly_0821_release~13991^2~500^2~3 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e55f605c14679c30be41473e60b7ad26524cdc35;p=firefly-linux-kernel-4.4.55.git tracing/ftrace: remove unused code in sched_switch tracer Impact: cleanup When init_sched_switch_trace() is called, it has no reason to start the sched tracer if the sched_ref is not zero. _ If this is non-zero, the tracer is already used, but we can register it to the tracing engine. There is already a security which avoid the tracer probes not to be resgistered twice. _ If this is zero, this block will not be used. Signed-off-by: Frederic Weisbecker Signed-off-by: Ingo Molnar --- diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c index 59de5141207c..96620c714300 100644 --- a/kernel/trace/trace_sched_switch.c +++ b/kernel/trace/trace_sched_switch.c @@ -203,14 +203,6 @@ static struct tracer sched_switch_trace __read_mostly = __init static int init_sched_switch_trace(void) { - int ret = 0; - - if (atomic_read(&sched_ref)) - ret = tracing_sched_register(); - if (ret) { - pr_info("error registering scheduler trace\n"); - return ret; - } return register_tracer(&sched_switch_trace); } device_initcall(init_sched_switch_trace);