Messages in this thread Patch in this message | | | Subject | [PATCH 4/6] tracing/ftrace: Remove unused code in sched_switch tracer | From | Frederic Weisbecker <> | Date | Fri, 10 Oct 2008 14:21:08 |
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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> CC: Steven Rostedt <rostedt@goodmis.org> --- kernel/trace/trace_sched_switch.c | 8 -------- 1 files changed, 0 insertions(+), 8 deletions(-)
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c index 59de514..96620c7 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);
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