linux-kernel - Re: [PATCH 1/3] perf events: fix WARN_ON

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Message-ID: <20110218170450.GB302@ghostprotocols.net>
Date:	Fri, 18 Feb 2011 15:04:50 -0200
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	David Ahern <daahern@...co.com>, linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org, mingo@...e.hu, paulus@...ba.org
Subject: Re: [PATCH 1/3] perf events: fix WARN_ON_ONCE for 64-bit raw data,
 SW events

Em Fri, Feb 18, 2011 at 04:01:31PM +0100, Peter Zijlstra escreveu:
> On Fri, 2011-02-18 at 12:53 -0200, Arnaldo Carvalho de Melo wrote:
> > > So size should be changed to u64 rather than modifying the
> > WARN_ON_ONCE?
> > 
> > Yeah, I guess so, 32-bit has to die it seems, gets in the way of
> > testing
> > :-) 
> 
> No!
> 
> 1) don't use RAW unless you have to
> 2) you don't have to, goto 1
> 3) if you do anyway, ensure its properly padded

Ok, but using that struct definition on 32-bit land, will lead to non 8 byte
alignment, right?

- Arnaldo
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