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From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: Haiyang Zhang <haiyangz@microsoft.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>,
	"davem\@davemloft.net" <davem@davemloft.net>,
	"saeedm\@mellanox.com" <saeedm@mellanox.com>,
	"leon\@kernel.org" <leon@kernel.org>,
	"eranbe\@mellanox.com" <eranbe@mellanox.com>,
	"lorenzo.pieralisi\@arm.com" <lorenzo.pieralisi@arm.com>,
	"bhelgaas\@google.com" <bhelgaas@google.com>,
	"linux-pci\@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"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
Date: Fri, 16 Aug 2019 18:16:17 +0200
Message-ID: <871rxl84ry.fsf@vitty.brq.redhat.com> (raw)
In-Reply-To: <DM6PR21MB13375FA0BA0220A91EF448E1CAAF0@DM6PR21MB1337.namprd21.prod.outlook.com>

Haiyang Zhang <haiyangz@microsoft.com> writes:

>
> 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.

(/me wondering is there a nicer way around this, by using __weak or
something like that...)

In case this stub is the best solution I'd suggest to rename it to
something like PCI_HYPERV_INTERFACE to make it clear it is not a
separate driver (_MINI makes me think so).

-- 
Vitaly

  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-14 19:08 [PATCH net-next, 0/6] Add software backchannel and mlx5e HV VHCA stats Haiyang Zhang
2019-08-14 19:08 ` [PATCH net-next, 1/6] PCI: hv: Add a paravirtual backchannel in software Haiyang Zhang
2019-08-14 19:08 ` [PATCH net-next, 2/6] PCI: hv: Add a Hyper-V PCI mini driver for software backchannel interface Haiyang Zhang
2019-08-16 12:27   ` Vitaly Kuznetsov
2019-08-16 14:48     ` Haiyang Zhang
2019-08-16 16:16       ` Vitaly Kuznetsov [this message]
2019-08-16 19:50         ` Haiyang Zhang
2019-08-14 19:08 ` [PATCH net-next, 3/6] net/mlx5: Add wrappers for HyperV PCIe operations Haiyang Zhang
2019-08-14 20:41   ` Mark Bloch
2019-08-15 11:34     ` Eran Ben Elisha
2019-08-19 15:04       ` Haiyang Zhang
2019-08-14 19:08 ` [PATCH net-next, 4/6] net/mlx5: Add HV VHCA infrastructure Haiyang Zhang
2019-08-14 20:41   ` Mark Bloch
2019-08-15 11:35     ` Eran Ben Elisha
2019-08-14 19:09 ` [PATCH net-next, 5/6] net/mlx5: Add HV VHCA control agent Haiyang Zhang
2019-08-14 20:41   ` Mark Bloch
2019-08-15 11:35     ` Eran Ben Elisha
2019-08-14 19:09 ` [PATCH net-next, 6/6] net/mlx5e: Add mlx5e HV VHCA stats agent Haiyang Zhang

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