Messages in this thread | | | Subject | Re: [PATCH] Define wc_wmb, a write barrier for PCI write combining | From | Bryan O'Sullivan <> | Date | Tue, 28 Feb 2006 09:57:55 -0800 |
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On Tue, 2006-02-28 at 05:01 -0500, Jes Sorensen wrote:
> Could you explain why the current mmiowb() API won't suffice for this? > It seems that this is basically trying to achieve the same thing.
It's a no-op on every arch I care about:
#define mmiowb()
Which makes it useless. Also, based on the comments in the qla driver, mmiowb() seems to have inter-CPU ordering semantics that I don't want. I'm thus hesitant to appropriate it for my needs.
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