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From:   Haiyang Zhang <haiyangz@microsoft.com>
To:     vkuznets <vkuznets@redhat.com>
CC:     KY Srinivasan <kys@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "sashal@kernel.org" <sashal@kernel.org>,
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        "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: RE: [PATCH net-next, 2/6] PCI: hv: Add a Hyper-V PCI mini driver for
 software backchannel interface
Thread-Topic: [PATCH net-next, 2/6] PCI: hv: Add a Hyper-V PCI mini driver for
 software backchannel interface
Thread-Index: AQHVUtO4i0f5rhE14EmISE1mYwr8y6b9tkuAgAAliYCAABphgIAAO6cw
Date:   Fri, 16 Aug 2019 19:50:13 +0000
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> -----Original Message-----
> From: Vitaly Kuznetsov <vkuznets@redhat.com>
> Sent: Friday, August 16, 2019 12:16 PM
> To: Haiyang Zhang <haiyangz@microsoft.com>
> Cc: KY Srinivasan <kys@microsoft.com>; Stephen Hemminger
> <sthemmin@microsoft.com>; linux-kernel@vger.kernel.org;
> sashal@kernel.org; davem@davemloft.net; saeedm@mellanox.com;
> leon@kernel.org; eranbe@mellanox.com; lorenzo.pieralisi@arm.com;
> bhelgaas@google.com; linux-pci@vger.kernel.org; linux-
> hyperv@vger.kernel.org; netdev@vger.kernel.org
> Subject: RE: [PATCH net-next, 2/6] PCI: hv: Add a Hyper-V PCI mini driver=
 for
> software backchannel interface
>=20
> Haiyang Zhang <haiyangz@microsoft.com> writes:
>=20
> >
> > The pci_hyperv can only be loaded on VMs on Hyper-V and Azure. Other
> > drivers like MLX5e will have symbolic dependency of pci_hyperv if they
> > use functions exported by pci_hyperv. This dependency will cause other
> > drivers fail to load on other platforms, like VMs on KVM. So we
> > created this mini driver, which can be loaded on any platforms to
> > provide the symbolic dependency.
>=20
> (/me wondering is there a nicer way around this, by using __weak or
> something like that...)
>=20
> In case this stub is the best solution I'd suggest to rename it to someth=
ing like
> PCI_HYPERV_INTERFACE to make it clear it is not a separate driver (_MINI
> makes me think so).

Thanks! I will consider those options.