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SubjectRe: [PATCH v3] virtio: new feature to detect IOMMU device quirk
Hi,

[auto build test WARNING on stable/master]
[also build test WARNING on v4.7-rc7 next-20160722]
[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/Michael-S-Tsirkin/virtio-new-feature-to-detect-IOMMU-device-quirk/20160724-030032
base: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git master
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

include/linux/compiler.h:232:8: sparse: attribute 'no_sanitize_address': unknown attribute
drivers/virtio/virtio_ring.c:1109:22: sparse: undefined identifier 'VIRTIO_F_IOMMU_PASSTHROUGH'
drivers/virtio/virtio_ring.c:1113:50: sparse: undefined identifier 'VIRTIO_F_IOMMU_PASSTHROUGH'
>> drivers/virtio/virtio_ring.c:1109:22: sparse: incompatible types for 'case' statement
drivers/virtio/virtio_ring.c:1109:22: sparse: Expected constant expression in case statement
drivers/virtio/virtio_ring.c: In function 'vring_transport_features':
drivers/virtio/virtio_ring.c:1109:8: error: 'VIRTIO_F_IOMMU_PASSTHROUGH' undeclared (first use in this function)
case VIRTIO_F_IOMMU_PASSTHROUGH:
^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/virtio/virtio_ring.c:1109:8: note: each undeclared identifier is reported only once for each function it appears in

vim +/case +1109 drivers/virtio/virtio_ring.c

1093 }
1094 EXPORT_SYMBOL_GPL(vring_del_virtqueue);
1095
1096 /* Manipulates transport-specific feature bits. */
1097 void vring_transport_features(struct virtio_device *vdev)
1098 {
1099 unsigned int i;
1100
1101 for (i = VIRTIO_TRANSPORT_F_START; i < VIRTIO_TRANSPORT_F_END; i++) {
1102 switch (i) {
1103 case VIRTIO_RING_F_INDIRECT_DESC:
1104 break;
1105 case VIRTIO_RING_F_EVENT_IDX:
1106 break;
1107 case VIRTIO_F_VERSION_1:
1108 break;
> 1109 case VIRTIO_F_IOMMU_PASSTHROUGH:
1110 break;
1111 case VIRTIO_F_IOMMU_PLATFORM:
1112 /* Ignore passthrough hint for now, obey kernel config. */
1113 __virtio_clear_bit(vdev, VIRTIO_F_IOMMU_PASSTHROUGH);
1114 break;
1115 default:
1116 /* We don't understand this bit. */
1117 __virtio_clear_bit(vdev, i);

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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