On Sat, 31 Aug 2013 12:44:31 -0700
"Paul E. McKenney" <paul...@linux.vnet.ibm.com> wrote:
> On Sat, Aug 31, 2013 at 01:11:20AM -0400, Steven Rostedt wrote:
> > From: "Steven Rostedt (Red Hat)" <rost...@goodmis.org>
> >
> > Since none of the internal ftrace function tracing uses RCU in
> > their callbacks, it is OK to set the global_ops (the one that
> > they all use) to RCU safe.
> >
> > Cc: Jiri Olsa <jo...@redhat.com>
> > Cc: Paul E. McKenney <paul...@linux.vnet.ibm.com>
> > Signed-off-by: Steven Rostedt <rost...@goodmis.org>
>
> Acked-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
You must have liked this patch so much... that you acked it twice ;-)
-- Steve
>
> > ---
> > kernel/trace/ftrace.c | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> > index d61f431..a45deaa 100644
> > --- a/kernel/trace/ftrace.c
> > +++ b/kernel/trace/ftrace.c
> > @@ -1146,7 +1146,9 @@ static struct ftrace_ops global_ops = {
> > .func = ftrace_stub,
> > .notrace_hash = EMPTY_HASH,
> > .filter_hash = EMPTY_HASH,
> > - .flags = FTRACE_OPS_FL_RECURSION_SAFE |
> > FTRACE_OPS_FL_INITIALIZED,
> > + .flags = FTRACE_OPS_FL_RECURSION_SAFE |
> > + FTRACE_OPS_FL_INITIALIZED |
> > + FTRACE_OPS_FL_RCU_SAFE,
> > INIT_REGEX_LOCK(global_ops)
> > };
> >
> > --
> > 1.7.10.4
> >
> >
--
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