From e55f605c14679c30be41473e60b7ad26524cdc35 Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Fri, 31 Oct 2008 13:14:28 +0100
Subject: [PATCH] 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>
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