linux-kernel - Re: [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization

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Date:	Fri, 29 Apr 2011 21:18:15 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Arnaldo Carvalho de Melo <acme@...radead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH 1/2] perf probe: Fix the missed parameter
 initialization

On Fri, 2011-04-29 at 17:44 +0800, Ingo Molnar wrote:
> * Lin Ming <ming.m.lin@...el.com> wrote:
> 
> > pubname_callback_param::found should be initialized to 0 in fastpath lookup.
> > 
> > Signed-off-by: Lin Ming <ming.m.lin@...el.com>
> > ---
> >  tools/perf/util/probe-finder.c |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> > 
> > diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
> > index a7c7145..3b9d0b8 100644
> > --- a/tools/perf/util/probe-finder.c
> > +++ b/tools/perf/util/probe-finder.c
> > @@ -1538,6 +1538,7 @@ static int find_probes(int fd, struct probe_finder *pf)
> >  			.file	  = pp->file,
> >  			.cu_die	  = &pf->cu_die,
> >  			.sp_die	  = &pf->sp_die,
> > +			.found	  = 0,
> 
> Hm, why is this a 'misc cleanup'? If this field is uninitialized (it does 

I should call it 'misc cleanup and fix'.

> appear so) and we rely on the field then right now this is a bug and the fix 
> should be pushed to perf/urgent.

Indeed.

> 
> Thanks,
> 
> 	Ingo


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