linux-kernel - Re: [PATCH 14/26] perf tools: Introduce struct perf_hpp

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Date:	Tue, 26 Jan 2016 00:00:46 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 14/26] perf tools: Introduce struct perf_hpp_list

On Mon, Jan 18, 2016 at 10:24:12AM +0100, Jiri Olsa wrote:
> Gather output and sort lists under struct perf_hpp_list,
> so we could have multiple instancies of sort/output format
> entries.
> 
> Replacing current perf_hpp__list and perf_hpp__sort_list
> lists with single perf_hpp_list instance.
> 
> Link: http://lkml.kernel.org/n/tip-bdn1hamlwp2529thajbrh2w7@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/ui/hist.c   | 11 ++++++-----
>  tools/perf/util/hist.h | 16 ++++++++++------
>  2 files changed, 16 insertions(+), 11 deletions(-)
> 
> diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
> index 2cd1a03bf375..1253a62c422f 100644
> --- a/tools/perf/ui/hist.c
> +++ b/tools/perf/ui/hist.c
> @@ -436,9 +436,10 @@ struct perf_hpp_fmt perf_hpp__format[] = {
>  	HPP__PRINT_FNS("Period", period, PERIOD)
>  };
>  
> -LIST_HEAD(perf_hpp__list);
> -LIST_HEAD(perf_hpp__sort_list);
> -
> +struct perf_hpp_list perf_hpp_list = {
> +	.list		= LIST_HEAD_INIT(perf_hpp_list.list),
> +	.sort_list	= LIST_HEAD_INIT(perf_hpp_list.sort_list),

As the struct name already contains 'list', I don't think we need to
repeat it in the fields.  


> +};
>  
>  #undef HPP__COLOR_PRINT_FNS
>  #undef HPP__COLOR_ACC_PRINT_FNS
> @@ -506,7 +507,7 @@ void perf_hpp__init(void)
>  
>  void perf_hpp__column_register(struct perf_hpp_fmt *format)
>  {
> -	list_add_tail(&format->list, &perf_hpp__list);
> +	list_add_tail(&format->list, &perf_hpp_list.list);
>  }
>  
>  void perf_hpp__column_unregister(struct perf_hpp_fmt *format)
> @@ -516,7 +517,7 @@ void perf_hpp__column_unregister(struct perf_hpp_fmt *format)
>  
>  void perf_hpp__register_sort_field(struct perf_hpp_fmt *format)
>  {
> -	list_add_tail(&format->sort_list, &perf_hpp__sort_list);
> +	list_add_tail(&format->sort_list, &perf_hpp_list.sort_list);
>  }
>  
>  void perf_hpp__cancel_cumulate(void)
> diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
> index f3bcf2d38733..a9c8ccfcc284 100644
> --- a/tools/perf/util/hist.h
> +++ b/tools/perf/util/hist.h
> @@ -226,20 +226,24 @@ struct perf_hpp_fmt {
>  	int idx;
>  };
>  
> -extern struct list_head perf_hpp__list;
> -extern struct list_head perf_hpp__sort_list;
> +struct perf_hpp_list {
> +	struct list_head list;
> +	struct list_head sort_list;
> +};

What about this?

  struct perf_hpp_list {
    struct list_head fields;
    struct list_head sorts;
  };

This also aligns with the option names.

Thanks,
Namhyung


> +
> +extern struct perf_hpp_list perf_hpp_list;
>  
>  #define perf_hpp__for_each_format(format) \
> -	list_for_each_entry(format, &perf_hpp__list, list)
> +	list_for_each_entry(format, &perf_hpp_list.list, list)
>  
>  #define perf_hpp__for_each_format_safe(format, tmp)	\
> -	list_for_each_entry_safe(format, tmp, &perf_hpp__list, list)
> +	list_for_each_entry_safe(format, tmp, &perf_hpp_list.list, list)
>  
>  #define perf_hpp__for_each_sort_list(format) \
> -	list_for_each_entry(format, &perf_hpp__sort_list, sort_list)
> +	list_for_each_entry(format, &perf_hpp_list.sort_list, sort_list)
>  
>  #define perf_hpp__for_each_sort_list_safe(format, tmp)	\
> -	list_for_each_entry_safe(format, tmp, &perf_hpp__sort_list, sort_list)
> +	list_for_each_entry_safe(format, tmp, &perf_hpp_list.sort_list, sort_list)
>  
>  extern struct perf_hpp_fmt perf_hpp__format[];
>  
> -- 
> 2.4.3
>