Messages in this thread | | | Date | Wed, 06 Dec 2006 17:09:11 -0800 (PST) | Subject | Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it | From | David Miller <> |
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From: Al Viro <viro@ftp.linux.org.uk> Date: Wed, 6 Dec 2006 19:08:28 +0000
> On Wed, Dec 06, 2006 at 11:05:22AM -0800, Linus Torvalds wrote: > > > > > > On Wed, 6 Dec 2006, Christoph Lameter wrote: > > > > > > I'd really appreciate a cmpxchg that is generically available for > > > all arches. It will allow lockless implementation for various performance > > > criticial portions of the kernel. > > > > I suspect ARM may have been the last one without one, no? > > No. sparc32 doesn't have one, for instance.
That's correct. It has an atomic swap, but not a cmpxchg. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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