linux-kernel - Re: [cpuops cmpxchg double V2 1/4] Generic support for this_cpu_cmpxchg

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Message-ID: <20110121163454.GF2832@htj.dyndns.org>
Date:	Fri, 21 Jan 2011 17:34:54 +0100
From:	Tejun Heo <tj@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Christoph Lameter <cl@...ux.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [cpuops cmpxchg double V2 1/4] Generic support for
 this_cpu_cmpxchg_double

On Fri, Jan 21, 2011 at 08:30:41AM -0800, H. Peter Anvin wrote:
> There is a technical argument: any noninline version will have
> actual code overhead.

But the type checking and all those stuff have to be macros anyway.
If out-of-line implementation is necessary, it can take whatever
parameter to optimize performance from the frontend macro.

Thanks.

-- 
tejun
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