linux-kernel - Re: [PATCH v1 net-next 4/7] ptp_pch: Switch to use module_pci

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Message-ID: <20210813112312.62f4ac42@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 13 Aug 2021 11:23:12 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     kernel test robot <lkp@...el.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kbuild-all@...ts.01.org,
        Richard Cochran <richardcochran@...il.com>
Subject: Re: [PATCH v1 net-next 4/7] ptp_pch: Switch to use
 module_pci_driver() macro

On Fri, 13 Aug 2021 18:39:14 +0300 Andy Shevchenko wrote:
> On Fri, Aug 13, 2021 at 06:13:21PM +0300, Andy Shevchenko wrote:
> > On Fri, Aug 13, 2021 at 10:34:17PM +0800, kernel test robot wrote:  
> > > Hi Andy,
> > > 
> > > I love your patch! Yet something to improve:
> > > 
> > > [auto build test ERROR on net-next/master]
> > > 
> > > url:    https://github.com/0day-ci/linux/commits/Andy-Shevchenko/ptp_pch-use-mac_pton/20210813-203135
> > > base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git b769cf44ed55f4b277b89cf53df6092f0c9082d0
> > > config: nios2-randconfig-r023-20210813 (attached as .config)
> > > compiler: nios2-linux-gcc (GCC) 11.2.0
> > > reproduce (this is a W=1 build):
> > >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> > >         chmod +x ~/bin/make.cross
> > >         # https://github.com/0day-ci/linux/commit/6c1fff5c80fe8f1a12c20bac2d28ebfa5960bde7
> > >         git remote add linux-review https://github.com/0day-ci/linux
> > >         git fetch --no-tags linux-review Andy-Shevchenko/ptp_pch-use-mac_pton/20210813-203135
> > >         git checkout 6c1fff5c80fe8f1a12c20bac2d28ebfa5960bde7
> > >         # save the attached .config to linux build tree
> > >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=nios2 
> > > 
> > > If you fix the issue, kindly add following tag as appropriate
> > > Reported-by: kernel test robot <lkp@...el.com>  
> > 
> > Thanks!
> > 
> > Definitely I have compiled it in my local branch. I'll check what is the root
> > cause of this.  
> 
> Kconfig misses PCI dependency. I will send a separate patch, there is nothing
> to do here.

That patch has to be before this one, tho. There is a static inline
stub for pci_register_driver() etc. if !PCI, but there isn't for
module_pci_driver(), meaning in builds without PCI this driver used 
to be harmlessly pointless, now it's breaking build.

Am I missing something?

Adding Bjorn in case he has a preference on adding the dependency vs
stubbing out module_pci_driver().