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From: David Howells <dhowells@redhat.com>
In-Reply-To: <20061206191252.GH32748@xi.wantstofly.org> 
References: <20061206191252.GH32748@xi.wantstofly.org>  <20061206164314.19870.33519.stgit@warthog.cambridge.redhat.com> 
Subject: Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it 
Date: Wed, 06 Dec 2006 19:47:22 +0000
Message-ID: <28668.1165434442@redhat.com>
Sender: linux-arch-owner@vger.kernel.org
To: Lennert Buytenhek <buytenh@wantstofly.org>
Cc: David Howells <dhowells@redhat.com>, torvalds@osdl.org, akpm@osdl.org, linux-arm-kernel@lists.arm.linux.org.uk, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
List-ID: <linux-arch.vger.kernel.org>

Lennert Buytenhek <buytenh@wantstofly.org> wrote:

> > Pre-v6 ARM doesn't support SMP according to ARM's atomic.h,
> 
> That's not quite true, there exist ARMv5 processors that in theory
> can support SMP.

I meant that the Linux ARM arch doesn't support it:

	#else /* ARM_ARCH_6 */

	#include <asm/system.h>

	#ifdef CONFIG_SMP
	#error SMP not supported on pre-ARMv6 CPUs
	#endif

David