linux-kernel - Re: [PATCH 3/9] perf util: Get rid of write_or

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Date:	Tue, 19 Mar 2013 10:59:57 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 3/9] perf util: Get rid of write_or_die() from
 trace-event-info.c

On Tue, 2013-03-19 at 15:49 +0100, Peter Zijlstra wrote:
> On Tue, 2013-03-19 at 10:35 -0400, Steven Rostedt wrote:
> > What about:
> >         int err = 0;
> > 
> >         err += tracing_data_header();
> >         err += read_header_files();
> >         [...]
> > 
> >         if (err < 0) {
> >                 free(tdata);
> >                 tdata = NULL;
> >         }
> > 
> > Also, is the only clean up needed be freeing tdata?
> 
> I always use err |= foo() and if (err) but I suppose it doesn't matter
> the original error codes are lost both ways which doesn't seem to be a
> problem here.

err |= foo() is fine too. Both are better that err1, err2, err3, ...,
errN :-)

-- Steve


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