Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH] Document Linux's memory barriers [try #2] | Date | Wed, 08 Mar 2006 19:08:42 +0000 |
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Alan Cox <alan@redhat.com> 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);
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