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Date: Thu, 07 Dec 2006 21:16:03 +0000 From: David Howells <dhowells@...hat.com> To: James Bottomley <James.Bottomley@...elEye.com> Cc: David Howells <dhowells@...hat.com>, Andrew Morton <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() James Bottomley <James.Bottomley@...elEye.com> wrote: > That we'd have to put a conditional jump in there is an incorrect > assumption on risc machines. I didn't say we would *have* to put a conditional jump in there. But I don't know that I it can be avoided on all archs. 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. David - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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