linux-kernel - Re: [PATCH] PCI: pci-hyperv: fix build errors on non-SYSFS config

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Message-ID: <20190815104748.GB9511@e121166-lin.cambridge.arm.com>
Date:   Thu, 15 Aug 2019 11:47:56 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-pci <linux-pci@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jake Oshins <jakeo@...rosoft.com>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Sasha Levin <sashal@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Dexuan Cui <decui@...rosoft.com>
Subject: Re: [PATCH] PCI: pci-hyperv: fix build errors on non-SYSFS config

On Fri, Jul 12, 2019 at 08:53:19AM -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.
> 
> Also, depending on X86 && X86_64 is not needed, so just change that
> to depend on X86_64.
> 
> Fixes: a15f2c08c708 ("PCI: hv: support reporting serial number as slot
> information")

Fixed line break on Fixes tag, FYI.

> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Matthew Wilcox <willy@...radead.org>
> Cc: Jake Oshins <jakeo@...rosoft.com>
> Cc: "K. Y. Srinivasan" <kys@...rosoft.com>
> Cc: Haiyang Zhang <haiyangz@...rosoft.com>
> Cc: Stephen Hemminger <sthemmin@...rosoft.com>
> Cc: Stephen Hemminger <stephen@...workplumber.org>
> Cc: Sasha Levin <sashal@...nel.org>
> Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> Cc: linux-pci@...r.kernel.org
> Cc: linux-hyperv@...r.kernel.org
> Cc: Dexuan Cui <decui@...rosoft.com>
> ---
> v3: corrected Fixes: tag [Dexuan Cui <decui@...rosoft.com>]
>     This is the Microsoft-preferred version of the patch.
> 
>  drivers/pci/Kconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied to pci/hv for v5.4.

Thanks,
Lorenzo

> --- lnx-52.orig/drivers/pci/Kconfig
> +++ lnx-52/drivers/pci/Kconfig
> @@ -181,7 +181,7 @@ config PCI_LABEL
>  
>  config PCI_HYPERV
>          tristate "Hyper-V PCI Frontend"
> -        depends on X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
> +        depends on X86_64 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && SYSFS
>          help
>            The PCI device frontend driver allows the kernel to import arbitrary
>            PCI devices from a PCI backend to support PCI driver domains.
> 
>