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Groups > linux.kernel > #1563886
| From | Steven Rostedt <rostedt@goodmis.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip |
| Date | 2017-01-20 21:00 +0100 |
| Message-ID | <t1NvP-31Y-3@gated-at.bofh.it> (permalink) |
| References | <t1y3L-1Vd-3@gated-at.bofh.it> <t1y3L-1Vd-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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 */
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[PATCH 1/3] ftrace: Factor out __ftrace_hash_move() Namhyung Kim <namhyung@kernel.org> - 2017-01-20 04:30 +0100
[PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip Namhyung Kim <namhyung@kernel.org> - 2017-01-20 04:30 +0100
Re: [PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip Steven Rostedt <rostedt@goodmis.org> - 2017-01-20 21:00 +0100
Re: [PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip Namhyung Kim <namhyung@kernel.org> - 2017-01-21 01:30 +0100
Re: [PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip Steven Rostedt <rostedt@goodmis.org> - 2017-01-21 03:20 +0100
Re: [PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip Namhyung Kim <namhyung@kernel.org> - 2017-01-21 03:30 +0100
Re: [PATCH 1/3] ftrace: Factor out __ftrace_hash_move() Steven Rostedt <rostedt@goodmis.org> - 2017-01-20 18:30 +0100
Re: [PATCH 1/3] ftrace: Factor out __ftrace_hash_move() Namhyung Kim <namhyung@kernel.org> - 2017-01-21 01:30 +0100
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