Re: 2.6.6-mm5

[Matt Mackall]

On Sat, May 22, 2004 at 06:15:51PM -0700, Roland Dreier wrote:
>     Andrew> I don't think we can expect all architectures to be able
>     Andrew> to implement atomic 64-bit IO's, can we?
> 
>     Andrew> ergo, drivers which want to use readq and writeq should
>     Andrew> provide the appropriate locking.
> 
> Perhaps we should have ARCH_HAS_ATOMIC_WRITEQ or something so that
> drivers don't add the overhead of locking on architectures where it's
> not necessary?

Or perhaps we just need a lockless __readq/__writeq for drivers that
know better.

-- 
Mathematics is the supreme nostalgia of our time.
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