Hi Kirti, [auto build test WARNING on vfio/next] [also build test WARNING on v4.7 next-20160803] [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/Kirti-Wankhede/Add-Mediated-device-support/20160804-032209 base: https://github.com/awilliam/linux-vfio.git next config: i386-allyesconfig (attached as .config) compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): drivers/vfio/mdev/vfio_mpci.c: In function 'mdev_dev_mmio_fault': drivers/vfio/mdev/vfio_mpci.c:384:17: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] u64 virtaddr = (u64)vmf->virtual_address; ^ >> drivers/vfio/mdev/vfio_mpci.c:424:32: warning: right shift count >= width of type [-Wshift-count-overflow] index = VFIO_PCI_OFFSET_TO_INDEX(vma->vm_pgoff << PAGE_SHIFT); ^~ vim +424 drivers/vfio/mdev/vfio_mpci.c 378 static int mdev_dev_mmio_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 379 { 380 int ret; 381 struct vfio_mdev *vmdev = vma->vm_private_data; 382 struct mdev_device *mdev; 383 struct parent_device *parent; > 384 u64 virtaddr = (u64)vmf->virtual_address; 385 unsigned long req_size, pgoff = 0; 386 pgprot_t pg_prot; 387 unsigned int index; 388 389 if (!vmdev && !vmdev->mdev) 390 return -EINVAL; 391 392 mdev = vmdev->mdev; 393 parent = mdev->parent; 394 395 pg_prot = vma->vm_page_prot; 396 397 if (parent->ops->validate_map_request) { 398 u64 offset; 399 loff_t pos; 400 401 offset = virtaddr - vma->vm_start; 402 req_size = vma->vm_end - virtaddr; 403 pos = (vma->vm_pgoff << PAGE_SHIFT) + offset; 404 405 ret = parent->ops->validate_map_request(mdev, pos, &virtaddr, 406 &pgoff, &req_size, &pg_prot); 407 if (ret) 408 return ret; 409 410 /* 411 * Verify pgoff and req_size are valid and virtaddr is within 412 * vma range 413 */ 414 if (!pgoff || !req_size || (virtaddr < vma->vm_start) || 415 ((virtaddr + req_size) >= vma->vm_end)) 416 return -EINVAL; 417 } else { 418 struct pci_dev *pdev; 419 420 virtaddr = vma->vm_start; 421 req_size = vma->vm_end - vma->vm_start; 422 423 pdev = to_pci_dev(parent->dev); > 424 index = VFIO_PCI_OFFSET_TO_INDEX(vma->vm_pgoff << PAGE_SHIFT); 425 pgoff = pci_resource_start(pdev, index) >> PAGE_SHIFT; 426 } 427 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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