Hi Eric, [auto build test WARNING on v4.5-rc1] [also build test WARNING on next-20160125] [cannot apply to iommu/next] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/Eric-Auger/KVM-PCIe-MSI-passthrough-on-ARM-ARM64/20160126-211921 config: i386-allmodconfig (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): drivers/vfio/pci/vfio_pci_intrs.c: In function 'vfio_set_mapped_msi_addr': >> drivers/vfio/pci/vfio_pci_intrs.c:324:43: warning: left shift count >= width >> of type [-Wshift-count-overflow] msi_addr = (phys_addr_t)(msg.address_hi) << 32 | ^ >> drivers/vfio/pci/vfio_pci_intrs.c:333:34: warning: right shift count >= >> width of type [-Wshift-count-overflow] msg.address_hi = (u32)(msi_iova >> 32); ^ vim +324 drivers/vfio/pci/vfio_pci_intrs.c 318 dma_addr_t msi_iova; 319 struct vfio_group *group = vdev->vfio_group; 320 struct msi_msg msg; 321 int ret; 322 323 get_cached_msi_msg(irq, &msg); > 324 msi_addr = (phys_addr_t)(msg.address_hi) << 32 | 325 (phys_addr_t)(msg.address_lo); 326 327 ret = vfio_group_alloc_map_reserved_iova(group, msi_addr, 328 IOMMU_WRITE, &msi_iova); 329 if (ret) 330 goto out; 331 332 /* Re-program the msi-address with the iova */ > 333 msg.address_hi = (u32)(msi_iova >> 32); 334 msg.address_lo = (u32)(msi_iova & 0xffffffff); 335 pci_write_msi_msg(irq, &msg); 336 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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