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    SubjectRe: Opinion on ordering of writel vs. stores to RAM

    > I suspect the best thing at this point is to move the sync in writeX()
    > before the store, as you suggest, and add an "eieio" before the load
    > in readX(). That does mean that we are then relying on driver writers
    > putting in the mmiowb() between a writeX() and a spin_unlock, but at
    > least that is documented.

    Well, why keep the sync in writel then ? Isn't it agreed that the driver
    should use an explicit barrier ? Or did I misunderstand Linus ?


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