linux-kernel - RE: [PATCH] PCI: hv: fix pci-hyperv build, depends on SYSFS

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Date:   Wed, 3 Jul 2019 04:40:16 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Randy Dunlap <rdunlap@...radead.org>,
        Matthew Wilcox <willy@...radead.org>,
        Yuehaibing <yuehaibing@...wei.com>
CC:     LKML <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        Jake Oshins <jakeo@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>,
        linux-pci <linux-pci@...r.kernel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: RE: [PATCH] PCI: hv: fix pci-hyperv build, depends on SYSFS

> From: linux-hyperv-owner@...r.kernel.org
> <linux-hyperv-owner@...r.kernel.org> On Behalf Of Randy Dunlap
> Sent: Tuesday, July 2, 2019 8:25 PM
> To: Matthew Wilcox <willy@...radead.org>
> Cc: LKML <linux-kernel@...r.kernel.org>; linux-hyperv@...r.kernel.org; Jake
> Oshins <jakeo@...rosoft.com>; KY Srinivasan <kys@...rosoft.com>; Haiyang
> Zhang <haiyangz@...rosoft.com>; Stephen Hemminger
> <sthemmin@...rosoft.com>; Sasha Levin <sashal@...nel.org>; linux-pci
> <linux-pci@...r.kernel.org>; Bjorn Helgaas <bhelgaas@...gle.com>
> Subject: Re: [PATCH] PCI: hv: fix pci-hyperv build, depends on SYSFS
> 
> On 7/2/19 5:15 PM, Matthew Wilcox wrote:
> > On Tue, Jul 02, 2019 at 04:24:30PM -0700, Randy Dunlap wrote:
> >> From: Randy Dunlap <rdunlap@...radead.org>
> >>
> >> Fix build errors when building almost-allmodconfig but with SYSFS
> >> not set (not enabled).  Fixes these build errors:
> >>
> >> ERROR: "pci_destroy_slot" [drivers/pci/controller/pci-hyperv.ko] undefined!
> >> ERROR: "pci_create_slot" [drivers/pci/controller/pci-hyperv.ko] undefined!
> >>
> >> drivers/pci/slot.o is only built when SYSFS is enabled, so
> >> pci-hyperv.o has an implicit dependency on SYSFS.
> >> Make that explicit.
> >
> > I wonder if we shouldn't rather provide no-op versions of
> > pci_create|destroy_slot for when SYSFS is not set?
> >
> 
> Makes sense.  I'm test-building that now.
> 
> --
> ~Randy

+ Yuehaibing, who submitted a similar patch, which I guess is neglected
at the end of the discussion last month:

https://lkml.org/lkml/2019/5/31/559
https://lkml.org/lkml/2019/6/14/784
https://lkml.org/lkml/2019/6/15/24

Thanks,
-- Dexuan