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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linus Torvalds <torvalds@transmeta.com>,
        Jeff Garzik <jgarzik@mandrakesoft.com>
Cc: Ingo Molnar <mingo@elte.hu>, Alexander Viro <viro@math.psu.edu>,
        Andrew Morton <akpm@zip.com.au>, Martin Wirth <Martin.Wirth@dlr.de>,
        Robert Love <rml@tech9.net>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        haveblue <haveblue@us.ibm.com>
Subject: Re: [RFC] New locking primitive for 2.5
Date: Fri, 8 Feb 2002 22:40:12 +0100
Message-Id: <20020208214012.26611@smtp.wanadoo.fr>
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>Are there architectures out there that absolutely must implement this
>with a spinlock?  Your suggested API of functions to read/write 64-bit
>values atomically would work for such a case, but still I am just
>curious.

At least PPC32 can't do that without a spinlock_irq

Ben.


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