linux-kernel - Re: [PATCH] perf tools: Fix a building error introduced by recent new patch

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Date:	Fri, 27 Feb 2015 10:36:06 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Yunlong Song <yunlong.song@...wei.com>
Cc:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	linux-kernel@...r.kernel.org, wangnan0@...wei.com, jolsa@...nel.org
Subject: Re: [PATCH] perf tools: Fix a building error introduced by recent
 new patch

Em Fri, Feb 27, 2015 at 07:53:46PM +0800, Yunlong Song escreveu:
> The recent new patch "perf tools: Add new 'perf data' command" (commit
> 2245bf14 in acme's git repo perf/core) has caused a building error when
> compiling the source code of perf:
> 
>  cc1: warnings being treated as errors
>  builtin-data.c:89: error: missing initializer
>  builtin-data.c:89: error: (near initialization for ‘data_cmds[1].summary’)
>  make[2]: *** [builtin-data.o] Error 1
>  make[2]: *** Waiting for unfinished jobs....
>    LD       bench/perf-in.o
>    LD       tests/perf-in.o
>  make[1]: *** [perf-in.o] Error 2
>  make: *** [all] Error 2
> 
> This patch fixes the building error above.
> 
> Signed-off-by: Yunlong Song <yunlong.song@...wei.com>
> ---
>  tools/perf/builtin-data.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c
> index 9705ba7..0385063 100644
> --- a/tools/perf/builtin-data.c
> +++ b/tools/perf/builtin-data.c
> @@ -86,7 +86,7 @@ static int cmd_data_convert(int argc, const char **argv,
>  
>  static struct data_cmd data_cmds[] = {
>  	{ "convert", "converts data file between formats", cmd_data_convert },
> -	{ NULL },
> +	{ NULL, NULL, NULL },

I guess here we could just do it as:

	{ NULL, },

Will check and apply that instead, as it is more "future proof", i.e. if
a new field is introduced to this struct, one doesn't need to bother
updating the data_cmds array sentinel.

- Arnaldo

>  };
>  
>  int cmd_data(int argc, const char **argv, const char *prefix)
> -- 
> 1.8.5.5
> 
> --
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