On Fri, 2011-12-09 at 18:45 +0000, David Miller wrote:

From: Laszlo Ersek <redacted>
Date: Fri,  9 Dec 2011 12:38:58 +0100

quoted

These two together provide complete ordering. Sub-condition (1) is
satisfied by pvops commit 43223efd9bfd.

I don't see this commit in Linus's tree,

The referenced commit is in
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git#xen/next-2.6.32  some people call the "pvops tree" but there's no reason to expect someone outside the Xen world to know that...

A better reference would have been 6b0b80ca7165 in
git://xenbits.xen.org/people/ianc/linux-2.6.git#upstream/dom0/backend/netback-history which is the precise branch that was flattened to make f942dc2552b8, which is the upstream commit that added netback, so this change is already in upstream.

Ian.