Re: [PATCH 10/12] tracing: Update sample file to describe the new macro

From: Steven Rostedt
Date: Tue Jun 13 2017 - 17:08:13 EST


On Wed, 31 May 2017 16:56:51 -0500
Jeremy Linton <jeremy.linton@xxxxxxx> wrote:

> Add a blurb in the trace sample file to describe
> the macro used to add sizeof to value conversions.
>
> Signed-off-by: Jeremy Linton <jeremy.linton@xxxxxxx>
> ---
> samples/trace_events/trace-events-sample.h | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/samples/trace_events/trace-events-sample.h b/samples/trace_events/trace-events-sample.h
> index 76a75ab..82e1e66 100644
> --- a/samples/trace_events/trace-events-sample.h
> +++ b/samples/trace_events/trace-events-sample.h
> @@ -225,6 +225,13 @@ TRACE_DEFINE_ENUM(TRACE_SAMPLE_FOO);
> TRACE_DEFINE_ENUM(TRACE_SAMPLE_BAR);
> TRACE_DEFINE_ENUM(TRACE_SAMPLE_ZOO);
>
> +/*
> + * The same problem as above applies to sizeof(), so there is also
> + * a macro to solve that problem.
> + */
> +
> +TRACE_DEFINE_SIZEOF(pteval_t);
> +

Could you add this in the example too. That is, a use case. Just
having the define isn't a proper sample. You want to use it in a
TP_printk() too.

-- Steve

> TRACE_EVENT(foo_bar,
>
> TP_PROTO(const char *foo, int bar, const int *lst,