Dave Airlie wrote:
On 7/19/07, Andrew Morton <[email protected]> wrote:
On Thu, 19 Jul 2007 18:15:03 +1000 "Dave Airlie" <[email protected]>
wrote:
> Maybe we could add CONFIG_HAVE_CMPXCHG and let DRM depend on it..
That would certainly be better than adding a sprinkle of architectures
in DRM Kconfig dependencies.
I don't know how important DRM is on ARM. Zero?
I'd guess zero I suppose if you wanted you could hook up a PCI
graphics card on ARM, but if you do that I think you could implement
cmpxchg :-)
ARM does the locked load / store conditional thing which is at least as
strong as cmpxchg, so I imagine it could implement this API in kernel
and userspace quite easily if needed.
--
SUSE Labs, Novell Inc.
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