From 5fec6ddcb43a91aa9a254c8ecf174c803de6f07e Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Tue, 17 Mar 2009 19:59:53 -0400
Subject: [PATCH] tracing: make sched_switch stop/start light weight

The stopping and starting of a tracer should be light weight and
be able to be called in all contexts. The sched_switch grabbed
mutexes in the start/stop functions. This patch changes it to a
simple variable, on/off.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
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