linux-kernel - Re: [PATCH] perf: Fix perf probe build error

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Date:	Tue, 20 Apr 2010 20:02:45 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
CC:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH] perf: Fix perf probe build error

Frederic Weisbecker wrote:
> When we run into dry run mode, we want to make write_kprobe_trace_event
> to succeed on writing the event. Let's initialize it to 0.
> 
> Fixes the following build error:
> 	util/probe-event.c:1266: attention : «ret» may be used uninitialized in this function
> 	util/probe-event.c:1266: note: «ret» was declared here
> 
> Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
> Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> Cc: Masami Hiramatsu <mhiramat@...hat.com>
> Cc: Ingo Molnar <mingo@...e.hu>
> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Cc: Paul Mackerras <paulus@...ba.org>

Acked-by: Masami Hiramatsu <mhiramat@...hat.com>

Thanks! that's what I've found today...

> ---
>  tools/perf/util/probe-event.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
> index 3967f8f..4fb4803 100644
> --- a/tools/perf/util/probe-event.c
> +++ b/tools/perf/util/probe-event.c
> @@ -1263,7 +1263,7 @@ static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group)
>  
>  static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev)
>  {
> -	int ret;
> +	int ret = 0;
>  	char *buf = synthesize_kprobe_trace_command(tev);
>  
>  	if (!buf) {

-- 
Masami Hiramatsu
e-mail: mhiramat@...hat.com
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