From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [PATCH] vhost-user: enable virtio 1.0
Date: Tue, 03 Nov 2015 09:26:21 +0100
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Cc: dev@dpdk.org, "Michael S. Tsirkin" <mst@redhat.com>
To: "Xie, Huawei" <huawei.xie@intel.com>, Marcel Apfelbaum <marcel@redhat.com>
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2015-11-03 08:16, Xie, Huawei:
> On 11/3/2015 4:03 PM, Marcel Apfelbaum wrote:
> > On 11/03/2015 05:49 AM, Xu, Qian Q wrote:
> >> Sorry, correct the kernel info, my kernel version is
> >> 4.1.8-100.fc21.x86_64.
> >
> > Hi,
> >
> > This is weird, VIRTIO_F_VERSION_1 is defined in 4.0 (I think), and for
> > sure in 4.1 .
> > You can see commit 4ec22fae (virtio: add virtio 1.0 feature bit) from
> > 2014-10-22 in kernel git.
> >
> > Can you please check a mismatch in header files of your development
> > machine?
> Marcel:
> Would you prepare the ifdef fix? We have done the same thing in vhost
> multiple queue patch.

Everybody (including me) forgot the support of older kernel.
Please provide a fix ASAP.