linux-kernel - Re: [PATCH v11 2/5] USB: misc: Add onboard_usb

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Date:   Mon, 7 Jun 2021 20:23:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     kernel test robot <lkp@...el.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        kbuild-all@...ts.01.org, Michal Simek <monstr@...str.eu>,
        Ravi Chandra Sadineni <ravisadineni@...omium.org>,
        linux-usb@...r.kernel.org, Bastien Nocera <hadess@...ess.net>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v11 2/5] USB: misc: Add onboard_usb_hub driver

On Mon, Jun 07, 2021 at 10:51:57AM -0700, Matthias Kaehlcke wrote:
> On Sat, Jun 05, 2021 at 07:18:38AM +0800, kernel test robot wrote:
> > Hi Matthias,
> > 
> > I love your patch! Perhaps something to improve:
> > 
> > [auto build test WARNING on next-20210604]
> > [also build test WARNING on v5.13-rc4]
> > [cannot apply to usb/usb-testing robh/for-next char-misc/char-misc-testing driver-core/driver-core-testing linus/master v5.13-rc4 v5.13-rc3 v5.13-rc2]
> > [If your patch is applied to the wrong git tree, kindly drop us a note.
> > And when submitting patch, we suggest to use '--base' as documented in
> > https://git-scm.com/docs/git-format-patch]
> > 
> > url:    https://github.com/0day-ci/linux/commits/Matthias-Kaehlcke/USB-misc-Add-onboard_usb_hub-driver/20210605-054213
> > base:    ccc252d2e818f6a479441119ad453c3ce7c7c461
> > config: arc-allyesconfig (attached as .config)
> > compiler: arceb-elf-gcc (GCC) 9.3.0
> > 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/7107f99a12058b7147342c6f763d026102bd6606
> >         git remote add linux-review https://github.com/0day-ci/linux
> >         git fetch --no-tags linux-review Matthias-Kaehlcke/USB-misc-Add-onboard_usb_hub-driver/20210605-054213
> >         git checkout 7107f99a12058b7147342c6f763d026102bd6606
> >         # save the attached .config to linux build tree
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 
> > 
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@...el.com>
> > 
> > All warnings (new ones prefixed by >>):
> > 
> > >> drivers/usb/misc/onboard_usb_hub.c:400:6: warning: no previous prototype for 'onboard_hub_create_pdevs' [-Wmissing-prototypes]
> >      400 | void onboard_hub_create_pdevs(struct usb_device *parent_hub, struct list_head *pdev_list)
> >          |      ^~~~~~~~~~~~~~~~~~~~~~~~
> > >> drivers/usb/misc/onboard_usb_hub.c:458:6: warning: no previous prototype for 'onboard_hub_destroy_pdevs' [-Wmissing-prototypes]
> >      458 | void onboard_hub_destroy_pdevs(struct list_head *pdev_list)
> >          |      ^~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Oh, I wasn't aware that prototypes are required for public functions.

How else can they be called?