Re: [PATCH 3/3] virtio-pmem: Add virtio pmem driver

kbuild test robot
2018-09-04T15:17:00Z

Hi Pankaj,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linux-nvdimm/libnvdimm-for-next]
[also build test ERROR on v4.19-rc2 next-20180903]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Pankaj-Gupta/kvm-fake-DAX-device/20180903-160032
base: https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-for-next
config: i386-randconfig-a3-201835 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
:::::: branch date: 21 hours ago
:::::: commit date: 21 hours ago

All errors (new ones prefixed by >>):

drivers/virtio/virtio_pmem.o: In function `virtio_pmem_remove':
>> drivers/virtio/virtio_pmem.c:220: undefined reference to `nvdimm_bus_unregister'
drivers/virtio/virtio_pmem.o: In function `virtio_pmem_probe':
>> drivers/virtio/virtio_pmem.c:186: undefined reference to `nvdimm_bus_register'
>> drivers/virtio/virtio_pmem.c:198: undefined reference to `nvdimm_pmem_region_create'
drivers/virtio/virtio_pmem.c:207: undefined reference to `nvdimm_bus_unregister'

# https://github.com/0day-ci/linux/commit/acce2633da18b0ad58d0cc9243a85b03020ca099
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout acce2633da18b0ad58d0cc9243a85b03020ca099
vim +220 drivers/virtio/virtio_pmem.c

acce2633 Pankaj Gupta 2018-08-31 147
acce2633 Pankaj Gupta 2018-08-31 148 static int virtio_pmem_probe(struct virtio_device *vdev)
acce2633 Pankaj Gupta 2018-08-31 149 {
acce2633 Pankaj Gupta 2018-08-31 150 int err = 0;
acce2633 Pankaj Gupta 2018-08-31 151 struct resource res;
acce2633 Pankaj Gupta 2018-08-31 152 struct virtio_pmem *vpmem;
acce2633 Pankaj Gupta 2018-08-31 153 struct nvdimm_bus *nvdimm_bus;
acce2633 Pankaj Gupta 2018-08-31 154 struct nd_region_desc ndr_desc;
acce2633 Pankaj Gupta 2018-08-31 155 int nid = dev_to_node(&vdev->dev);
acce2633 Pankaj Gupta 2018-08-31 156 struct nd_region *nd_region;
acce2633 Pankaj Gupta 2018-08-31 157
acce2633 Pankaj Gupta 2018-08-31 158 if (!vdev->config->get) {
acce2633 Pankaj Gupta 2018-08-31 159 dev_err(&vdev->dev, "%s failure: config disabled\n",
acce2633 Pankaj Gupta 2018-08-31 160 __func__);
acce2633 Pankaj Gupta 2018-08-31 161 return -EINVAL;
acce2633 Pankaj Gupta 2018-08-31 162 }
acce2633 Pankaj Gupta 2018-08-31 163
acce2633 Pankaj Gupta 2018-08-31 164 vdev->priv = vpmem = devm_kzalloc(&vdev->dev, sizeof(*vpmem),
acce2633 Pankaj Gupta 2018-08-31 165 GFP_KERNEL);
acce2633 Pankaj Gupta 2018-08-31 166 if (!vpmem) {
acce2633 Pankaj Gupta 2018-08-31 167 err = -ENOMEM;
acce2633 Pankaj Gupta 2018-08-31 168 goto out_err;
acce2633 Pankaj Gupta 2018-08-31 169 }
acce2633 Pankaj Gupta 2018-08-31 170
acce2633 Pankaj Gupta 2018-08-31 171 vpmem->vdev = vdev;
acce2633 Pankaj Gupta 2018-08-31 172 err = init_vq(vpmem);
acce2633 Pankaj Gupta 2018-08-31 173 if (err)
acce2633 Pankaj Gupta 2018-08-31 174 goto out_err;
acce2633 Pankaj Gupta 2018-08-31 175
acce2633 Pankaj Gupta 2018-08-31 176 virtio_cread(vpmem->vdev, struct virtio_pmem_config,
acce2633 Pankaj Gupta 2018-08-31 177 start, &vpmem->start);
acce2633 Pankaj Gupta 2018-08-31 178 virtio_cread(vpmem->vdev, struct virtio_pmem_config,
acce2633 Pankaj Gupta 2018-08-31 179 size, &vpmem->size);
acce2633 Pankaj Gupta 2018-08-31 180
acce2633 Pankaj Gupta 2018-08-31 181 res.start = vpmem->start;
acce2633 Pankaj Gupta 2018-08-31 182 res.end = vpmem->start + vpmem->size-1;
acce2633 Pankaj Gupta 2018-08-31 183 vpmem->nd_desc.provider_name = "virtio-pmem";
acce2633 Pankaj Gupta 2018-08-31 184 vpmem->nd_desc.module = THIS_MODULE;
acce2633 Pankaj Gupta 2018-08-31 185
acce2633 Pankaj Gupta 2018-08-31 @186 vpmem->nvdimm_bus = nvdimm_bus = nvdimm_bus_register(&vdev->dev,
acce2633 Pankaj Gupta 2018-08-31 187 &vpmem->nd_desc);
acce2633 Pankaj Gupta 2018-08-31 188 if (!nvdimm_bus)
acce2633 Pankaj Gupta 2018-08-31 189 goto out_vq;
acce2633 Pankaj Gupta 2018-08-31 190
acce2633 Pankaj Gupta 2018-08-31 191 dev_set_drvdata(&vdev->dev, nvdimm_bus);
acce2633 Pankaj Gupta 2018-08-31 192 memset(&ndr_desc, 0, sizeof(ndr_desc));
acce2633 Pankaj Gupta 2018-08-31 193
acce2633 Pankaj Gupta 2018-08-31 194 ndr_desc.res = &res;
acce2633 Pankaj Gupta 2018-08-31 195 ndr_desc.numa_node = nid;
acce2633 Pankaj Gupta 2018-08-31 196 ndr_desc.flush = virtio_pmem_flush;
acce2633 Pankaj Gupta 2018-08-31 197 set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);
acce2633 Pankaj Gupta 2018-08-31 @198 nd_region = nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc);
acce2633 Pankaj Gupta 2018-08-31 199
acce2633 Pankaj Gupta 2018-08-31 200 if (!nd_region)
acce2633 Pankaj Gupta 2018-08-31 201 goto out_nd;
acce2633 Pankaj Gupta 2018-08-31 202
acce2633 Pankaj Gupta 2018-08-31 203 //virtio_device_ready(vdev);
acce2633 Pankaj Gupta 2018-08-31 204 return 0;
acce2633 Pankaj Gupta 2018-08-31 205 out_nd:
acce2633 Pankaj Gupta 2018-08-31 206 err = -ENXIO;
acce2633 Pankaj Gupta 2018-08-31 207 nvdimm_bus_unregister(nvdimm_bus);
acce2633 Pankaj Gupta 2018-08-31 208 out_vq:
acce2633 Pankaj Gupta 2018-08-31 209 vdev->config->del_vqs(vdev);
acce2633 Pankaj Gupta 2018-08-31 210 out_err:
acce2633 Pankaj Gupta 2018-08-31 211 dev_err(&vdev->dev, "failed to register virtio pmem memory\n");
acce2633 Pankaj Gupta 2018-08-31 212 return err;
acce2633 Pankaj Gupta 2018-08-31 213 }
acce2633 Pankaj Gupta 2018-08-31 214
acce2633 Pankaj Gupta 2018-08-31 215 static void virtio_pmem_remove(struct virtio_device *vdev)
acce2633 Pankaj Gupta 2018-08-31 216 {
acce2633 Pankaj Gupta 2018-08-31 217 struct virtio_pmem *vpmem = vdev->priv;
acce2633 Pankaj Gupta 2018-08-31 218 struct nvdimm_bus *nvdimm_bus = dev_get_drvdata(&vdev->dev);
acce2633 Pankaj Gupta 2018-08-31 219
acce2633 Pankaj Gupta 2018-08-31 @220 nvdimm_bus_unregister(nvdimm_bus);
acce2633 Pankaj Gupta 2018-08-31 221 vdev->config->del_vqs(vdev);
acce2633 Pankaj Gupta 2018-08-31 222 kfree(vpmem);
acce2633 Pankaj Gupta 2018-08-31 223 }
acce2633 Pankaj Gupta 2018-08-31 224

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