Hi Jean-Philippe, I love your patch! Perhaps something to improve: [auto build test WARNING on iommu/next] [cannot apply to pci/next linus/master v5.6-rc3 next-20200228] [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/Jean-Philippe-Brucker/virtio-iom... base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next reproduce: # apt-get install sparse # sparse version: v0.6.1-173-ge0787745-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/iommu/virtio-iommu.c:1036:9: sparse: sparse: incompatible types in comparison expression (different base types): drivers/iommu/virtio-iommu.c:1036:9: sparse: restricted __le64 * drivers/iommu/virtio-iommu.c:1036:9: sparse: unsigned long long * drivers/iommu/virtio-iommu.c:1040:9: sparse: sparse: incompatible types in comparison expression (different base types): drivers/iommu/virtio-iommu.c:1040:9: sparse: restricted __le64 * drivers/iommu/virtio-iommu.c:1040:9: sparse: unsigned long long * drivers/iommu/virtio-iommu.c:1044:9: sparse: sparse: incompatible types in comparison expression (different base types): drivers/iommu/virtio-iommu.c:1048:9: sparse: sparse: incompatible types in comparison expression (different base types): drivers/iommu/virtio-iommu.c:1048:9: sparse: restricted __le32 * drivers/iommu/virtio-iommu.c:1048:9: sparse: unsigned int * drivers/iommu/virtio-iommu.c:1052:9: sparse: sparse: incompatible types in comparison expression (different base types): drivers/iommu/virtio-iommu.c:1052:9: sparse: restricted __le32 * drivers/iommu/virtio-iommu.c:1052:9: sparse: unsigned int * vim +1024 drivers/iommu/virtio-iommu.c edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 996 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 997 static int viommu_probe(struct virtio_device *vdev) edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 998 { edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 999 struct device *parent_dev = vdev->dev.parent; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1000 struct viommu_dev *viommu = NULL; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1001 struct device *dev = &vdev->dev; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1002 u64 input_start = 0; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1003 u64 input_end = -1UL; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1004 int ret; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1005 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1006 if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1) || edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1007 !virtio_has_feature(vdev, VIRTIO_IOMMU_F_MAP_UNMAP)) edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1008 return -ENODEV; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1009 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1010 viommu = devm_kzalloc(dev, sizeof(*viommu), GFP_KERNEL); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1011 if (!viommu) edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1012 return -ENOMEM; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1013 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1014 spin_lock_init(&viommu->request_lock); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1015 ida_init(&viommu->domain_ids); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1016 viommu->dev = dev; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1017 viommu->vdev = vdev; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1018 INIT_LIST_HEAD(&viommu->requests); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1019 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1020 ret = viommu_init_vqs(viommu); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1021 if (ret) edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1022 return ret; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1023 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 @1024 virtio_cread(vdev, struct virtio_iommu_config, page_size_mask, edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1025 &viommu->pgsize_bitmap); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1026 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1027 if (!viommu->pgsize_bitmap) { edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1028 ret = -EINVAL; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1029 goto err_free_vqs; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1030 } edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1031 ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1032 viommu->map_flags = VIRTIO_IOMMU_MAP_F_READ | VIRTIO_IOMMU_MAP_F_WRITE; ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1033 viommu->last_domain = ~0U; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1034 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1035 /* Optional features */ edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1036 virtio_cread_feature(vdev, VIRTIO_IOMMU_F_INPUT_RANGE, edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1037 struct virtio_iommu_config, input_range.start, edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1038 &input_start); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1039 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1040 virtio_cread_feature(vdev, VIRTIO_IOMMU_F_INPUT_RANGE, edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1041 struct virtio_iommu_config, input_range.end, edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1042 &input_end); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1043 ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 @1044 virtio_cread_feature(vdev, VIRTIO_IOMMU_F_DOMAIN_RANGE, ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1045 struct virtio_iommu_config, domain_range.start, ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1046 &viommu->first_domain); ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1047 ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1048 virtio_cread_feature(vdev, VIRTIO_IOMMU_F_DOMAIN_RANGE, ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1049 struct virtio_iommu_config, domain_range.end, ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1050 &viommu->last_domain); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1051 2a5a314874450d Jean-Philippe Brucker 2019-01-15 1052 virtio_cread_feature(vdev, VIRTIO_IOMMU_F_PROBE, 2a5a314874450d Jean-Philippe Brucker 2019-01-15 1053 struct virtio_iommu_config, probe_size, 2a5a314874450d Jean-Philippe Brucker 2019-01-15 1054 &viommu->probe_size); 2a5a314874450d Jean-Philippe Brucker 2019-01-15 1055 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1056 viommu->geometry = (struct iommu_domain_geometry) { edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1057 .aperture_start = input_start, edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1058 .aperture_end = input_end, edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1059 .force_aperture = true, edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1060 }; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1061 ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1062 if (virtio_has_feature(vdev, VIRTIO_IOMMU_F_MMIO)) ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1063 viommu->map_flags |= VIRTIO_IOMMU_MAP_F_MMIO; ae24fb49d01103 Jean-Philippe Brucker 2019-07-22 1064 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1065 viommu_ops.pgsize_bitmap = viommu->pgsize_bitmap; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1066 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1067 virtio_device_ready(vdev); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1068 169a126c6e88a9 Jean-Philippe Brucker 2019-01-15 1069 /* Populate the event queue with buffers */ 169a126c6e88a9 Jean-Philippe Brucker 2019-01-15 1070 ret = viommu_fill_evtq(viommu); 169a126c6e88a9 Jean-Philippe Brucker 2019-01-15 1071 if (ret) 169a126c6e88a9 Jean-Philippe Brucker 2019-01-15 1072 goto err_free_vqs; 169a126c6e88a9 Jean-Philippe Brucker 2019-01-15 1073 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1074 ret = iommu_device_sysfs_add(&viommu->iommu, dev, NULL, "%s", edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1075 virtio_bus_name(vdev)); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1076 if (ret) edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1077 goto err_free_vqs; edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1078 136495ceb43b56 Jean-Philippe Brucker 2020-02-28 1079 virt_set_iommu_ops(dev->parent, &viommu_ops); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1080 iommu_device_set_ops(&viommu->iommu, &viommu_ops); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1081 iommu_device_set_fwnode(&viommu->iommu, parent_dev->fwnode); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1082 edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1083 iommu_device_register(&viommu->iommu); edcd69ab9a323b Jean-Philippe Brucker 2019-01-15 1084 :::::: The code at line 1024 was first introduced by commit :::::: edcd69ab9a323b7ac7a86e1c44b6c9c46598391f iommu: Add virtio-iommu driver :::::: TO: Jean-Philippe Brucker <jean-philippe.brucker(a)arm.com&gt; :::::: CC: Michael S. Tsirkin <mst(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org