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>
> ---
> 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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