linux-kernel - Re: [PATCH 07/13 v4] perf tools: restrict visibility of functions

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Date:   Sun, 15 Nov 2020 22:17:42 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     James Clark <james.clark@....com>
Cc:     linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>
Subject: Re: [PATCH 07/13 v4] perf tools: restrict visibility of functions

On Fri, Nov 13, 2020 at 07:26:48PM +0200, James Clark wrote:
> These cpu_aggr_map refcounting functions are only used in
> builtin-stat.c so their visibilty can be reduced to just
> that file.
> 
> No functional changes.
> 
> Signed-off-by: James Clark <james.clark@....com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
> Cc: Jiri Olsa <jolsa@...hat.com>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Cc: Thomas Richter <tmricht@...ux.ibm.com>
> Cc: John Garry <john.garry@...wei.com>
> ---
>  tools/perf/builtin-stat.c | 15 +++++++++++++++
>  tools/perf/util/cpumap.c  | 15 ---------------
>  tools/perf/util/cpumap.h  |  2 --
>  3 files changed, 15 insertions(+), 17 deletions(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 7daac139f6cc..344e50651b55 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1326,6 +1326,21 @@ static int perf_stat_init_aggr_mode(void)
>  	return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
>  }
>  
> +static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
> +{
> +	if (map) {
> +		WARN_ONCE(refcount_read(&map->refcnt) != 0,
> +			  "cpu_aggr_map refcnt unbalanced\n");
> +		free(map);
> +	}
> +}
> +
> +static void cpu_aggr_map__put(struct cpu_aggr_map *map)
> +{
> +	if (map && refcount_dec_and_test(&map->refcnt))
> +		cpu_aggr_map__delete(map);
> +}

you could add them directly as static and skip this change

jirka

> +
>  static void perf_stat__exit_aggr_mode(void)
>  {
>  	cpu_aggr_map__put(stat_config.aggr_map);
> diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
> index e831a18ec95e..e90270f0be57 100644
> --- a/tools/perf/util/cpumap.c
> +++ b/tools/perf/util/cpumap.c
> @@ -112,21 +112,6 @@ struct cpu_aggr_map *cpu_aggr_map__empty_new(int nr)
>  	return cpus;
>  }
>  
> -void cpu_aggr_map__delete(struct cpu_aggr_map *map)
> -{
> -	if (map) {
> -		WARN_ONCE(refcount_read(&map->refcnt) != 0,
> -			  "cpu_aggr_map refcnt unbalanced\n");
> -		free(map);
> -	}
> -}
> -
> -void cpu_aggr_map__put(struct cpu_aggr_map *map)
> -{
> -	if (map && refcount_dec_and_test(&map->refcnt))
> -		cpu_aggr_map__delete(map);
> -}
> -
>  static int cpu__get_topology_int(int cpu, const char *name, int *value)
>  {
>  	char path[PATH_MAX];
> diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
> index d82822ddcbce..b112069038be 100644
> --- a/tools/perf/util/cpumap.h
> +++ b/tools/perf/util/cpumap.h
> @@ -21,8 +21,6 @@ struct perf_record_cpu_map_data;
>  
>  struct perf_cpu_map *perf_cpu_map__empty_new(int nr);
>  struct cpu_aggr_map *cpu_aggr_map__empty_new(int nr);
> -void cpu_aggr_map__delete(struct cpu_aggr_map *map);
> -void cpu_aggr_map__put(struct cpu_aggr_map *map);
>  
>  struct perf_cpu_map *cpu_map__new_data(struct perf_record_cpu_map_data *data);
>  size_t cpu_map__snprint(struct perf_cpu_map *map, char *buf, size_t size);
> -- 
> 2.28.0
>