From: Miles Bader <miles@gnu.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Christoph Lameter <cl@linux.com>, Tejun Heo <tj@kernel.org>,
        Pekka Enbeerg <penberg@cs.helsinki.fi>, linux-kernel@vger.kernel.org,
        Eric Dumazet <eric.dumazet@gmail.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Subject: Re: x86: A fast way to check capabilities of the current cpu
References: <alpine.DEB.2.00.1012151404070.21102@router.home>
	<20101215125626.25f7d648.akpm@linux-foundation.org>
	<4D092D15.7030700@zytor.com>
	<AANLkTimhdmWGhxW9qnFWYxiVDManH4XG4RqTLJb_Fdbk@mail.gmail.com>
	<4D093580.9000303@zytor.com> <buowrnakze2.fsf@dhlpc061.dev.necel.com>
	<AANLkTim+cbxPxgS+13anHQRdN42uLci6z48hbiyWFdaV@mail.gmail.com>
	<buooc8mko3x.fsf@dhlpc061.dev.necel.com> <4D0A3267.40300@zytor.com>
System-Type: x86_64-unknown-linux-gnu
Blat: Foop
Date: Fri, 17 Dec 2010 13:26:33 +0900
In-Reply-To: <4D0A3267.40300@zytor.com> (H. Peter Anvin's message of "Thu, 16
	Dec 2010 07:38:15 -0800")
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"H. Peter Anvin" <hpa@zytor.com> writes:
> The alternatives are equivalent when used in the common context.  Your
> examples are bogus, because they don't account for the
> __builtin_constant_p().

Ah, true ... :}

-miles

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