linux-kernel - Re: [PATCH] perf hists browser: remove superfluous null check on map

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Date:	Wed, 17 Aug 2016 00:28:47 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Colin King <colin.king@...onical.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Pekka Enberg <penberg@...nel.org>,
	Wang Nan <wangnan0@...wei.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf hists browser: remove superfluous null check on map

On Mon, Aug 15, 2016 at 05:25:43PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> map is being already checked if it is null at the start of
> do_zoom_dso, so the second subsequent check is superfluous
> and can be removed.
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung


> ---
>  tools/perf/ui/browsers/hists.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
> index 13d4143..8d72939 100644
> --- a/tools/perf/ui/browsers/hists.c
> +++ b/tools/perf/ui/browsers/hists.c
> @@ -2418,8 +2418,6 @@ do_zoom_dso(struct hist_browser *browser, struct popup_action *act)
>  		browser->hists->dso_filter = NULL;
>  		ui_helpline__pop();
>  	} else {
> -		if (map == NULL)
> -			return 0;
>  		ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s DSO\"",
>  				   __map__is_kernel(map) ? "the Kernel" : map->dso->short_name);
>  		browser->hists->dso_filter = map->dso;
> -- 
> 2.8.1
>