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SubjectRe: [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@intel.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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