linux-kernel - Re: [PATCH 0/3] perf/core, x86: unify perfctr bitmasks

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Message-ID: <20100331162647.GA15288@lenovo>
Date:	Wed, 31 Mar 2010 20:26:47 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Robert Richter <robert.richter@....com>,
	Stephane Eranian <eranian@...gle.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Lin Ming <ming.m.lin@...el.com>
Subject: Re: [PATCH 0/3] perf/core, x86: unify perfctr bitmasks

On Wed, Mar 31, 2010 at 08:15:23PM +0400, Cyrill Gorcunov wrote:
> On Tue, Mar 30, 2010 at 09:04:00PM +0200, Peter Zijlstra wrote:
> > On Tue, 2010-03-30 at 22:29 +0400, Cyrill Gorcunov wrote:
> [...]
> > > 
[...]
> +static inline bool p4_is_odd_cpl(u32 escr)
> +{
> +	unsigned int t0 = (escr & P4_ESCR_T0_ANY) << 0;
> +	unsigned int t1 = (escr & P4_ESCR_T1_ANY) << 2;
> +
> +	if ((t0 ^ t1) != t0)
> +		return true;

/me in shame: This is bogus, Peter don't take it yet.

> +
> +	return false;
> +}
[...]

	-- Cyrill
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