Messages in this thread | | | Date | Fri, 20 Jan 2017 14:54:20 -0500 | From | Steven Rostedt <> | Subject | Re: [PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip |
| |
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.
-- Steve
> > #ifdef CONFIG_DYNAMIC_FTRACE > /* TODO: make this variable */
| |