linux-kernel - Re: [PATCH] tools lib traceevent: Fix backward compatibility macros for pevent filter enums

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Date:	Tue, 22 Apr 2014 15:19:38 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH] tools lib traceevent: Fix backward compatibility macros
 for pevent filter enums

On Mon, Apr 21, 2014 at 10:23:46PM -0400, Steven Rostedt wrote:
> 
> The return value for pevent_filter_match() is suppose to return FILTER_NONE
> if the event doesn't have a filter, and FILTER_NOEXIST if there is no filter
> at all. But the change 41e12e580a7 "tools lib traceevent: Refactor
> pevent_filter_match() to get rid of die()" replaced the return value
> with PEVENT_ERRNO__* values and added "backward compatibility" macros
> that used the old names. Unfortunately, the NOEXIST and NONE macros were
> swapped, and this broke users that use the old return names.
> 
> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>

Acked-by: Jiri Olsa <jolsa@...hat.com>

thanks,
jirka

> ---
>  tools/lib/traceevent/event-parse.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
> index 9c38181..d6c610a 100644
> --- a/tools/lib/traceevent/event-parse.h
> +++ b/tools/lib/traceevent/event-parse.h
> @@ -886,8 +886,8 @@ struct event_filter {
>  struct event_filter *pevent_filter_alloc(struct pevent *pevent);
>  
>  /* for backward compatibility */
> -#define FILTER_NONE		PEVENT_ERRNO__FILTER_NOT_FOUND
> -#define FILTER_NOEXIST		PEVENT_ERRNO__NO_FILTER
> +#define FILTER_NONE		PEVENT_ERRNO__NO_FILTER
> +#define FILTER_NOEXIST		PEVENT_ERRNO__FILTER_NOT_FOUND
>  #define FILTER_MISS		PEVENT_ERRNO__FILTER_MISS
>  #define FILTER_MATCH		PEVENT_ERRNO__FILTER_MATCH
>  
> -- 
> 1.8.1.4
> 
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