linux-kernel - Re: [PATCH v11 08/14] s390/vfio-ap: hot plug/unplug queues on bind/unbind of queue device

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Date:   Fri, 23 Oct 2020 04:30:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tony Krowiak <akrowiak@...ux.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, freude@...ux.ibm.com,
        borntraeger@...ibm.com, cohuck@...hat.com, mjrosato@...ux.ibm.com,
        pasic@...ux.ibm.com, alex.williamson@...hat.com,
        kwankhede@...dia.com
Subject: Re: [PATCH v11 08/14] s390/vfio-ap: hot plug/unplug queues on
 bind/unbind of queue device

Hi Tony,

I love your patch! Perhaps something to improve:

[auto build test WARNING on s390/features]
[also build test WARNING on linus/master kvms390/next linux/master v5.9 next-20201022]
[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/Tony-Krowiak/s390-vfio-ap-dynamic-configuration-support/20201023-011543
base:   https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features
config: s390-allyesconfig (attached as .config)
compiler: s390-linux-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/aea9ab29b77facc3bb09415ebe464fd6a22ec22e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Tony-Krowiak/s390-vfio-ap-dynamic-configuration-support/20201023-011543
        git checkout aea9ab29b77facc3bb09415ebe464fd6a22ec22e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 

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/s390/crypto/vfio_ap_ops.c:1370:5: warning: no previous prototype for 'vfio_ap_mdev_reset_queue' [-Wmissing-prototypes]
    1370 | int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/s390/crypto/vfio_ap_ops.c:1617:6: warning: no previous prototype for 'vfio_ap_mdev_hot_unplug_queue' [-Wmissing-prototypes]
    1617 | void vfio_ap_mdev_hot_unplug_queue(struct vfio_ap_queue *q)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/vfio_ap_mdev_hot_unplug_queue +1617 drivers/s390/crypto/vfio_ap_ops.c

  1616	
> 1617	void vfio_ap_mdev_hot_unplug_queue(struct vfio_ap_queue *q)
  1618	{
  1619		unsigned long apid = AP_QID_CARD(q->apqn);
  1620	
  1621		if ((q->matrix_mdev == NULL) || !vfio_ap_mdev_has_crycb(q->matrix_mdev))
  1622			return;
  1623	
  1624		/*
  1625		 * If the APID is assigned to the guest, then let's
  1626		 * go ahead and unplug the adapter since the
  1627		 * architecture does not provide a means to unplug
  1628		 * an individual queue.
  1629		 */
  1630		if (test_bit_inv(apid, q->matrix_mdev->shadow_apcb.apm)) {
  1631			clear_bit_inv(apid, q->matrix_mdev->shadow_apcb.apm);
  1632	
  1633			if (bitmap_empty(q->matrix_mdev->shadow_apcb.apm, AP_DEVICES))
  1634				bitmap_clear(q->matrix_mdev->shadow_apcb.aqm, 0,
  1635					     AP_DOMAINS);
  1636	
  1637			vfio_ap_mdev_commit_shadow_apcb(q->matrix_mdev);
  1638		}
  1639	}
  1640	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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