Messages in this thread | | | Subject | Re: 2.6.6-mm5 | From | Roland Dreier <> | Date | 22 May 2004 18:15:51 -0700 |
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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?
(I happen to be working on a driver that needs atomic 64-bit writes, and where those writes happen to be in the fast path)
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