tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost head: f3861bc96a7e130943e1975e571ae62c0319b064 commit: 5f1f79bbc9e26fa9412fa9522f957bb8f030c442 [18/52] virtio-mem: Paravirtualized memory hotplug compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; cppcheck warnings: (new ones prefixed by >>) rc = virtio_mem_init_vq(vm); ^ drivers/virtio/virtio_mem.c:1375:0: note: Variable 'rc' is reassigned a value before the old one has been used. int rc = -EINVAL; ^ drivers/virtio/virtio_mem.c:1391:5: note: Variable 'rc' is reassigned a value before the old one has been used. rc = virtio_mem_init_vq(vm); ^ const uint64_t size = count * vm->subblock_size; ^ drivers/virtio/virtio_mem.c:822:22: warning: int result is assigned to long variable. If the variable is long to avoid loss of information, then you have loss of information. [truncLongCastAssignment] const uint64_t size = count * vm->subblock_size; ^ vim +/rc +1391 drivers/virtio/virtio_mem.c 1371 1372 static int virtio_mem_probe(struct virtio_device *vdev) 1373 { 1374 struct virtio_mem *vm; 1375 int rc = -EINVAL; 1376 1377 vdev->priv = vm = kzalloc(sizeof(*vm), GFP_KERNEL); 1378 if (!vm) 1379 return -ENOMEM; 1380 1381 init_waitqueue_head(&vm->host_resp); 1382 vm->vdev = vdev; 1383 INIT_WORK(&vm->wq, virtio_mem_run_wq); 1384 mutex_init(&vm->hotplug_mutex); 1385 INIT_LIST_HEAD(&vm->next); 1386 spin_lock_init(&vm->removal_lock); 1387 hrtimer_init(&vm->retry_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 1388 vm->retry_timer.function = virtio_mem_timer_expired; 1389 1390 /* register the virtqueue */ 1392 if (rc) 1393 goto out_free_vm; 1394 1395 /* initialize the device by querying the config */ 1396 rc = virtio_mem_init(vm); 1397 if (rc) 1398 goto out_del_vq; 1399 1400 /* register callbacks */ 1401 vm->memory_notifier.notifier_call = virtio_mem_memory_notifier_cb; 1402 rc = register_memory_notifier(&vm->memory_notifier); 1403 if (rc) 1404 goto out_del_vq; 1405 rc = register_virtio_mem_device(vm); 1406 if (rc) 1407 goto out_unreg_mem; 1408 1409 virtio_device_ready(vdev); 1410 1411 /* trigger a config update to start processing the requested_size */ 1412 atomic_set(&vm->config_changed, 1); 1413 queue_work(system_freezable_wq, &vm->wq); 1414 1415 return 0; 1416 out_unreg_mem: 1417 unregister_memory_notifier(&vm->memory_notifier); 1418 out_del_vq: 1419 vdev->config->del_vqs(vdev); 1420 out_free_vm: 1421 kfree(vm); 1422 vdev->priv = NULL; 1423 1424 return rc; 1425 } 1426 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org