linux-kernel - Re: [PATCH v2 13/13] perf tools: add feature header record to pipe-mode

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Date:   Thu, 25 May 2017 10:09:55 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     David Carrillo-Cisneros <davidcc@...gle.com>
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>, Simon Que <sque@...omium.org>,
        Wang Nan <wangnan0@...wei.com>, Jiri Olsa <jolsa@...nel.org>,
        He Kuang <hekuang@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        David Ahern <dsa@...ulusnetworks.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Paul Turner <pjt@...gle.com>
Subject: Re: [PATCH v2 13/13] perf tools: add feature header record to
 pipe-mode

On Tue, May 23, 2017 at 12:48:53AM -0700, David Carrillo-Cisneros wrote:

SNIP

>  };
>  
> @@ -488,6 +489,12 @@ struct time_conv_event {
>  	u64 time_zero;
>  };
>  
> +struct feature_event {
> +	struct perf_event_header header;
> +	u64 header_id;
> +	char data[]; /* size bytes of raw data specific to the feature */
> +};

please align the members, like it's in structs around

struct feature_event {
	struct perf_event_header	header;
	u64				header_id;
	char				data[];
}

thanks,
jirka