From: Ohad Ben-Cohen <ohad@wizery.com>
Date: Thu, 12 Jan 2012 07:26:57 +0000 (+0200)
Subject: remoteproc: don't use virtio's weak barriers
X-Git-Tag: v3.4-rc1~87^2~1^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd6da1c5e99a3b736b52370c504a2b8843cbfda6;p=pandora-kernel.git

remoteproc: don't use virtio's weak barriers

When creating a virtqueue for rpmsg, tell virtio we're not interested
in "weak" smp barriers, since we're talking to a real device.

On ARM, this means using a DSB instead of a DMB, which is needed
for platforms that kick the remote processor using some kind of
a mailbox device mapped to Device memory (otherwise the kick can
jump ahead and wake the remote processor before it has observed
the changes to the vrings).

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
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