From: Jason Wang <jasowang@redhat.com>
Date: Tue, 18 Jun 2013 05:04:23 +0000 (+0800)
Subject: drivers: hv: switch to use mb() instead of smp_mb()
X-Git-Tag: v3.2.49~56
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e4af376d04b03ff3ab2f27701bb183da6ee2aaff;p=pandora-kernel.git

drivers: hv: switch to use mb() instead of smp_mb()

commit 35848f68b07df3f917cb13fc3c134718669f569b upstream.

Even if guest were compiled without SMP support, it could not assume that host
wasn't. So switch to use mb() instead of smp_mb() to force memory barriers for
UP guest.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2:
 - Drop changes to functions that don't exist here
 - hv_ringbuffer_write() has only a write memory barrier]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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