[PATCH 3/3 v2] tracing: Prevent buffer overwrite disabled for latency tracers

From: "Steven Rostedt (Red Hat)" The latency tracers require the buffers to be in overwrite mode, otherwise they get screwed up. Force the buffers to stay in overwrite mode when latency tracers are enabled. Added a flag_changed() method to the tracer structure to allow the tracers to see what

[PATCH 3/3 v2] tracing: Prevent buffer overwrite disabled for latency tracers

From: Steven Rostedt (Red Hat) rost...@goodmis.org The latency tracers require the buffers to be in overwrite mode, otherwise they get screwed up. Force the buffers to stay in overwrite mode when latency tracers are enabled. Added a flag_changed() method to the tracer structure to allow the