linux-kernel - Re: [PATCH 3/3] tracing: Rename trace_synth() to synth_event

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Message-Id: <20250319223728.ca7a5ac6fa37798d17bd2e29@kernel.org>
Date: Wed, 19 Mar 2025 22:37:28 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Douglas RAILLARD <douglas.raillard@....com>
Cc: rostedt@...dmis.org, Masami Hiramatsu <mhiramat@...nel.org>, Mathieu
 Desnoyers <mathieu.desnoyers@...icios.com>, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] tracing: Rename trace_synth() to
 synth_event_trace2()

On Tue, 18 Mar 2025 18:08:12 +0000
Douglas RAILLARD <douglas.raillard@....com> wrote:

> From: Douglas Raillard <douglas.raillard@....com>
> 
> Rename the frehsly exposed trace_synth() to synth_event_trace2() to
> comply with the existing naming convention. Since synth_event_trace()
> already exists (and operates on a "struct trace_event_file *"), use a
> new name for it.
> 

I don't like this '2' and similar version digit naming for the functions.
Can you choose another better name?

BTW, can you also write a cover mail so that what is the goal of this
series, background and results?

Thank you,

> Signed-off-by: Douglas Raillard <douglas.raillard@....com>
> ---
>  include/linux/trace_events.h      | 2 +-
>  kernel/trace/trace_events_hist.c  | 2 +-
>  kernel/trace/trace_events_synth.c | 4 ++--
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
> index e069d84a73f0..753ce8aecfe4 100644
> --- a/include/linux/trace_events.h
> +++ b/include/linux/trace_events.h
> @@ -521,7 +521,7 @@ struct synth_event;
>  
>  extern struct synth_event *synth_event_find(const char *name);
>  
> -extern void trace_synth(struct synth_event *event, u64 *var_ref_vals,
> +extern void synth_event_trace2(struct synth_event *event, u64 *var_ref_vals,
>  			       unsigned int *var_ref_idx);
>  
>  extern int synth_event_delete(const char *name);
> diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
> index 7067f6fedb1a..ee0fee123c91 100644
> --- a/kernel/trace/trace_events_hist.c
> +++ b/kernel/trace/trace_events_hist.c
> @@ -822,7 +822,7 @@ static void action_trace(struct hist_trigger_data *hist_data,
>  {
>  	struct synth_event *event = data->synth_event;
>  
> -	trace_synth(event, var_ref_vals, data->var_ref_idx);
> +	synth_event_trace2(event, var_ref_vals, data->var_ref_idx);
>  }
>  
>  struct hist_var_data {
> diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c
> index 4a9a44d37ffc..8837aa258479 100644
> --- a/kernel/trace/trace_events_synth.c
> +++ b/kernel/trace/trace_events_synth.c
> @@ -850,7 +850,7 @@ EXPORT_SYMBOL_GPL(synth_event_find);
>  typedef void (*synth_probe_func_t) (void *__data, u64 *var_ref_vals,
>  				    unsigned int *var_ref_idx);
>  
> -void trace_synth(struct synth_event *event, u64 *var_ref_vals,
> +void synth_event_trace2(struct synth_event *event, u64 *var_ref_vals,
>  			       unsigned int *var_ref_idx)
>  {
>  	struct tracepoint *tp = event->tp;
> @@ -873,7 +873,7 @@ void trace_synth(struct synth_event *event, u64 *var_ref_vals,
>  		}
>  	}
>  }
> -EXPORT_SYMBOL_GPL(trace_synth);
> +EXPORT_SYMBOL_GPL(synth_event_trace2);
>  
>  static struct trace_event_fields synth_event_fields_array[] = {
>  	{ .type = TRACE_FUNCTION_TYPE,
> -- 
> 2.43.0
> 


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>