Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it

Al Viro
2006-12-06T19:08:37Z

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.