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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 <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2008-10-31 13:14:28 +01:00 committed by Ingo Molnar
parent 07695fa04e
commit e55f605c14
1 changed files with 0 additions and 8 deletions
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8
kernel/trace/trace_sched_switch.c
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@ -203,14 +203,6 @@ static struct tracer sched_switch_trace __read_mostly =
__init static int init_sched_switch_trace(void) __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); return register_tracer(&sched_switch_trace);
} }
device_initcall(init_sched_switch_trace); device_initcall(init_sched_switch_trace);