Re: uses of cmpxchg/xadd in spinlock.h and rwsem.h vs. CONFIG_M386

[Alan Cox]

> Oh, hmm, we do actually attempt to support 386 SMP kernels... I thought
> that config wasn't allowed, but looking at the atomic.h code, it has
> ifdef fallbacks.

We don't support running on SMP 386 hardware but we do in theory support
running uniproc on it.

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