Messages in this thread | | | Date | Mon, 24 May 2004 11:17:33 -0500 | From | Matt Mackall <> | Subject | Re: 2.6.6-mm5 |
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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.
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