linux-kernel - Re: [PATCH 3/3] WorkStruct: Use direct assignment rather than cmpxchg()

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Date:	Thu, 07 Dec 2006 14:11:40 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	dhowells@...hat.com
Cc:	James.Bottomley@...elEye.com, akpm@...l.org, torvalds@...l.org,
	davem@...emloft.com, wli@...omorphy.com, matthew@....cx,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH 3/3] WorkStruct: Use direct assignment rather than
 cmpxchg() 

From: David Howells <dhowells@...hat.com>
Date: Thu, 07 Dec 2006 21:16:03 +0000

> I don't know that sparc32 can do conditional instructions for
> example.  If we force this assumption it becomes a potential
> limitation on the archs we can support.  OTOH, it may be that every
> arch that supports SMP and has to emulate bitops with spinlocks also
> supports conditional stores; but I don't know that.

Sparc32 has normal branches but no conditional instruction execution.
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