From: Jason Wang <jasowang@redhat.com>
Date: Mon, 2 Sep 2013 08:40:58 +0000 (+0800)
Subject: vhost: switch to use vhost_add_used_n()
X-Git-Tag: v3.12-rc1~132^2~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c49e4e573be86acd36c747511ea5dc76be122206;p=pandora-kernel.git

vhost: switch to use vhost_add_used_n()

Let vhost_add_used() to use vhost_add_used_n() to reduce the code
duplication. To avoid the overhead brought by __copy_to_user(). We will use
put_user() when one used need to be added.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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