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SubjectRe: Opinion on ordering of writel vs. stores to RAM
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Ar Sad, 2006-09-09 am 17:23 +1000, ysgrifennodd Benjamin Herrenschmidt:
> The problem is that very few people have any clear idea of what mmiowb
> is :) In fact, what you described is not the definition of mmiowb
> according to Jesse

Some of us talked a little about this at Linux Kongress and one
suggestion so people did understand it was

spin_lock_io();
spin_unlock_io();

so that it can be expressed not as a weird barrier op but as part of the
locking.

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