linux-kernel - Re: [PATCH 1/3] perf: __perf_evlist__mmap: Fix errno value on failed map.

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Message-ID: <20111220175557.GA21838@infradead.org>
Date:	Tue, 20 Dec 2011 15:55:57 -0200
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Namhyung Kim <namhyung@...il.com>
Cc:	Nelson Elhage <nelhage@...hage.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] perf: __perf_evlist__mmap: Fix errno value on failed
 map.

Em Tue, Dec 20, 2011 at 12:33:30AM +0900, Namhyung Kim escreveu:
> >  	evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot,
> >  				      MAP_SHARED, fd, 0);
> > -	if (evlist->mmap[idx].base == MAP_FAILED)
> > +	if (evlist->mmap[idx].base == MAP_FAILED) {
> > +		evlist->mmap[idx].base = NULL;
> >  		return -1;
> > +	}
> >  
> >  	perf_evlist__add_pollfd(evlist, fd);
> >  	return 0;
> 
> Thanks for fixing this. I posted a basically same patch for this [1]
> last week, but it seems my patch doesn't get included yet (right?),
> and your patch looks bit simpler. So Arnaldo, I'm totally fine if you
> decide to take this instead of mine.

Yeah, Nelson's seems more simple, so I'm applying his and adding your
Acked-by,

Thanks,
 
> Thanks.
> Namhyung Kim
> 
> 
> [1] https://lkml.org/lkml/2011/12/12/275
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