linux-kernel - Re: [PATCH V2 1/1] scsi: storvsc: Fix a build issue reported by kbuild test robot

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Message-ID: <1454132178.9326.1.camel@HansenPartnership.com>
Date:	Sat, 30 Jan 2016 06:36:18 +0100
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>, gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	ohering@...e.com, hch@...radead.org, linux-scsi@...r.kernel.org,
	apw@...onical.com, vkuznets@...hat.com, jasowang@...hat.com,
	martin.petersen@...cle.com, hare@...e.de
Subject: Re: [PATCH V2 1/1] scsi: storvsc: Fix a build issue reported by
 kbuild test robot

On Fri, 2016-01-29 at 19:36 -0800, K. Y. Srinivasan wrote:
> tree:   https://na01.safelinks.protection.outlook.com/?url=https%3a%2
> f%2fgit.kernel.org%2fpub%2fscm%2flinux%2fkernel%2fgit%2ftorvalds%2fli
> nux.git&data=01%7c01%7ckys%40microsoft.com%7ce2e0622715844b79ad7108d3
> 2796ec3c%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=ubr4GbBaNS%2ftO
> z%2buJBk0CL9N0UNG9x2TidLgy6Yovg4%3d master
> head:   03c21cb775a313f1ff19be59c5d02df3e3526471
> commit: dac582417bc449b1f7f572d3f1dd9d23eec15cc9 storvsc: Properly
> support Fibre Channel devices
> date:   3 weeks ago
> config: x86_64-randconfig-s3-01281016 (attached as .config)
> reproduce:
>         git checkout dac582417bc449b1f7f572d3f1dd9d23eec15cc9
>         # save the attached .config to linux build tree
>         make ARCH=x86_64
> 
> All errors (new ones prefixed by >>):
> 
>    drivers/built-in.o: In function `storvsc_remove':
> > > storvsc_drv.c:(.text+0x213af7): undefined reference to
> > > `fc_remove_host'
>    drivers/built-in.o: In function `storvsc_drv_init':
> > > storvsc_drv.c:(.init.text+0xcbcc): undefined reference to
> > > `fc_attach_transport'
> > > storvsc_drv.c:(.init.text+0xcc06): undefined reference to
> > > `fc_release_transport'
>    drivers/built-in.o: In function `storvsc_drv_exit':
> > > storvsc_drv.c:(.exit.text+0x123c): undefined reference to
> > > `fc_release_transport'
> 
> With this commit, the storvsc driver depends on FC atttributes. Make
> this
> dependency explicit.
> 
> Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> Reported-by: Fengguang Wu <fengguang.wu@...el.com>
> ---
> 	V2: Fixed the dependency based on suggestion by James Bottomley
> <James.Bottomley@...senPartnership.com>
> 
>  drivers/scsi/Kconfig |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
> index 64eed87..ce0d07b 100644
> --- a/drivers/scsi/Kconfig
> +++ b/drivers/scsi/Kconfig
> @@ -594,6 +594,7 @@ config XEN_SCSI_FRONTEND
>  config HYPERV_STORAGE
>  	tristate "Microsoft Hyper-V virtual storage driver"
>  	depends on SCSI && HYPERV
> +	depends on SCSI_FC_ATTRS || SCSI_FC_ATTRS !=m

No ... if you want to depend on the FC_ATTRS then a simple depend
works.  If you want to be able to build without them or with them, then
that line must read

depends on m || SCSI_FC_ATTRS != m

James