Re: linux-2.5.18: DRM + cmpxchg issues

Keith Whitwell (keith@tungstengraphics.com)
Tue, 28 May 2002 09:13:04 +0100


Adam,

I expect the answer is that we need to dig out the old one.

Previously I don't think the full cmpxchg semantics werere required unless the
box is smp -- there's no case where atomic operations are required for
hardware interaction, for example. ...

Probably this changed with preempt, though, so we need one even on UP boxes...

Keith

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