On Tue, 5 Sep 2017 16:57:50 -0500
Tom Zanussi <tom.zanussi@xxxxxxxxxxxxxxx> wrote:
> Allow tracing code outside of trace.c to access tracing_set_clock().
>
> Some applications may require a particular clock in order to function
> properly, such as latency calculations.
>
> Also, add an accessor returning the current clock string.
It seems this patch should be merged in the next patch, which
is actual consumer of this API.
Thank you,
>
> Signed-off-by: Tom Zanussi <tom.zanussi@xxxxxxxxxxxxxxx>
> ---
> kernel/trace/trace.c | 2 +-
> kernel/trace/trace.h | 1 +
> 2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index d40839d..ecdf456 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -6207,7 +6207,7 @@ static int tracing_clock_show(struct seq_file *m, void *v)
> return 0;
> }
>
> -static int tracing_set_clock(struct trace_array *tr, const char *clockstr)
> +int tracing_set_clock(struct trace_array *tr, const char *clockstr)
> {
> int i;
>
> diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
> index 7b78762..1f3443a 100644
> --- a/kernel/trace/trace.h
> +++ b/kernel/trace/trace.h
> @@ -288,6 +288,7 @@ enum {
> extern void trace_array_put(struct trace_array *tr);
>
> extern int tracing_set_time_stamp_abs(struct trace_array *tr, bool abs);
> +extern int tracing_set_clock(struct trace_array *tr, const char *clockstr);
>
> extern bool trace_clock_in_ns(struct trace_array *tr);
>
> --
> 1.9.3
>
--
Masami Hiramatsu <mhiramat@xxxxxxxxxx>
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