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SubjectRe: [PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip
On Fri, Jan 20, 2017 at 02:54:20PM -0500, Steven Rostedt wrote:
> On Fri, 20 Jan 2017 11:44:46 +0900
> Namhyung Kim <namhyung@kernel.org> wrote:
>
>
> > --- a/kernel/trace/trace.h
> > +++ b/kernel/trace/trace.h
> > @@ -787,6 +787,20 @@ extern void __trace_graph_return(struct trace_array *tr,
> > struct ftrace_graph_ret *trace,
> > unsigned long flags, int pc);
> >
> > +struct ftrace_hash {
> > + unsigned long size_bits;
> > + struct hlist_head *buckets;
> > + unsigned long count;
> > + struct rcu_head rcu;
> > +};
> > +
> > +struct ftrace_func_entry *
> > +ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
> > +
> > +static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash)
> > +{
> > + return !hash || !hash->count;
> > +}
>
> Note, I had to modify this patch and move this declaration outside of
> the #ifdef CONFIG_FUNCTION_GRAPH_TRACER, as it failed to build when
> function graph wasn't enabled. Function tracer uses this too.

Oops, my bad.

Did you modify it in your tree? Or do you want me to resend v2?

Thanks,
Namhyung


> >
> > #ifdef CONFIG_DYNAMIC_FTRACE
> > /* TODO: make this variable */
>

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