Re: [PATCH] Document Linux's memory barriers [try #2]
From: David Howells
Date: Wed Mar 08 2006 - 14:06:37 EST
Alan Cox <alan@xxxxxxxxxx> wrote:
> spin_lock(&foo->lock);
> writel(0, &foo->regnum);
I presume there only needs to be an mmiowb() here if you've got the
appropriate CPU's I/O memory window set up to be weakly ordered.
> writel(1, &foo->data);
> mmiowb();
> spin_unlock(&foo->lock);
David
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