From: Michael S. Tsirkin <mst@redhat.com>
Date: Thu, 6 Dec 2012 12:03:34 +0000 (+0200)
Subject: vhost: avoid backend flush on vring ops
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~45^2~58^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=935cdee7ee159569b0aaa10bd9244660f6672b08;p=pandora-kernel.git

vhost: avoid backend flush on vring ops

vring changes already do a flush internally where appropriate, so we do
not need a second flush.

It's currently not very expensive but a follow-up patch makes flush more
heavy-weight, so remove the extra flush here to avoid regressing
performance if call or kick fds are changed on data path.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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