Ben, Can you ack this please? Thanks, -- Steve On Thu, 26 Jun 2014 12:52:30 -0400 Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > From: "Steven Rostedt (Red Hat)" <rostedt@xxxxxxxxxxx> > > ftrace_stop() is going away as it disables parts of function tracing > that affects users that should not be affected. But ftrace_graph_stop() > is built on ftrace_stop(). Here's another example of killing all of > function tracing because something went wrong with function graph > tracing. > > Instead of disabling all users of function tracing on function graph > error, disable only function graph tracing. To do this, the arch code > must call ftrace_graph_is_dead() before it implements function graph. > > Cc: Anton Blanchard <anton@xxxxxxxxx> > Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx> > --- > arch/powerpc/kernel/ftrace.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c > index f202d0731b06..f8c0ce5523a5 100644 > --- a/arch/powerpc/kernel/ftrace.c > +++ b/arch/powerpc/kernel/ftrace.c > @@ -527,6 +527,9 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) > struct ftrace_graph_ent trace; > unsigned long return_hooker = (unsigned long)&return_to_handler; > > + if (unlikely(ftrace_graph_is_dead())) > + return; > + > if (unlikely(atomic_read(¤t->tracing_graph_pause))) > return; > -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
