linux-kernel - Re: Why Semaphore Hardware-Dependent?

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Message-ID: <450845CC.6000402@yahoo.com.au>
Date:	Thu, 14 Sep 2006 03:54:20 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Andi Kleen <ak@...e.de>
CC:	Arjan van de Ven <arjan@...radead.org>,
	Dong Feng <middle.fengdong@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Christoph Lameter <clameter@....com>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	David Howells <dhowells@...hat.com>
Subject: Re: Why Semaphore Hardware-Dependent?

[sorry, I missed some emails when I was out of action a while back. Catching up...]

Andi Kleen wrote:
>>and chuck out the "crappy" rwsem fallback implementation
> 
> 
> What is crappy with it?

I just mean that it is supposedly the second class implementation. Just
seems wrong when powerpc has implemented the "better" version in a completely
generic way (patch to follow).

-- 
SUSE Labs, Novell Inc.
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