netdev - Re: [PATCH 2/3] usb, kcov: collect coverage from hub

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Message-ID: <CAAeHK+zZszdu9dLNW0UBjCpT4nVW5uiZPMpeMogBqN3T5oTPPw@mail.gmail.com>
Date:   Thu, 24 Oct 2019 15:39:04 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, USB list <linux-usb@...r.kernel.org>,
        KVM list <kvm@...r.kernel.org>,
        virtualization@...ts.linux-foundation.org,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        David Windsor <dwindsor@...il.com>,
        Elena Reshetova <elena.reshetova@...el.com>,
        Anders Roxell <anders.roxell@...aro.org>
Subject: Re: [PATCH 2/3] usb, kcov: collect coverage from hub_event

On Wed, Oct 23, 2019 at 9:11 PM kbuild test robot <lkp@...el.com> wrote:
>
> Hi Andrey,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on linus/master]
> [cannot apply to v5.4-rc4 next-20191023]
> [if your patch is applied to the wrong git tree, please drop us a note to help
> improve the system. BTW, we also suggest to use '--base' option to specify the
> base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
>
> url:    https://github.com/0day-ci/linux/commits/Andrey-Konovalov/kcov-collect-coverage-from-usb-and-vhost/20191023-185245
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3b7c59a1950c75f2c0152e5a9cd77675b09233d6
> config: s390-allmodconfig (attached as .config)
> compiler: s390-linux-gcc (GCC) 7.4.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         GCC_VERSION=7.4.0 make.cross ARCH=s390
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
> >> ERROR: "kcov_remote_stop" [drivers/usb/core/usbcore.ko] undefined!
> >> ERROR: "kcov_remote_start" [drivers/usb/core/usbcore.ko] undefined!

Indeed, we need EXPORT_SYMBOL() for kcov_common_handle(),
kcov_remote_start() and kcov_remote_stop(). Will fix in v3.

>
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation