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charset=us-ascii Content-Disposition: inline In-Reply-To: <20251204151003.171039-5-peterx@redhat.com> X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 9590510000A X-Stat-Signature: r5wmey51aoqytwqrgxgso4b6ko9b84ss X-Rspam-User: X-HE-Tag: 1764909241-231555 X-HE-Meta: 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 /RttFaxn 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Peter, kernel test robot noticed the following build warnings: [auto build test WARNING on awilliam-vfio/for-linus] [also build test WARNING on linus/master v6.18] [cannot apply to akpm-mm/mm-everything awilliam-vfio/next brauner-vfs/vfs.all next-20251204] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Peter-Xu/mm-thp-Allow-thp_get_unmapped_area_vmflags-to-take-alignment/20251204-231258 base: https://github.com/awilliam/linux-vfio.git for-linus patch link: https://lore.kernel.org/r/20251204151003.171039-5-peterx%40redhat.com patch subject: [PATCH v2 4/4] vfio-pci: Best-effort huge pfnmaps with !MAP_FIXED mappings config: i386-buildonly-randconfig-004-20251205 (https://download.01.org/0day-ci/archive/20251205/202512051241.QtfYgqkx-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251205/202512051241.QtfYgqkx-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202512051241.QtfYgqkx-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/vfio/pci/vfio_pci_core.c: In function 'vfio_pci_core_get_mapping_order': >> drivers/vfio/pci/vfio_pci_core.c:1670:51: warning: left shift count >= width of type [-Wshift-count-overflow] 1670 | req_start = (pgoff << PAGE_SHIFT) & ((1UL << VFIO_PCI_OFFSET_SHIFT) - 1); | ^~ vim +1670 drivers/vfio/pci/vfio_pci_core.c 1642 1643 /* 1644 * Hint function for mmap() about the size of mapping to be carried out. 1645 * This helps to enable huge pfnmaps as much as possible on BAR mappings. 1646 * 1647 * This function does the minimum check on mmap() parameters to make the 1648 * hint valid only. The majority of mmap() sanity check will be done later 1649 * in mmap(). 1650 */ 1651 int vfio_pci_core_get_mapping_order(struct vfio_device *device, 1652 unsigned long pgoff, size_t len) 1653 { 1654 struct vfio_pci_core_device *vdev = 1655 container_of(device, struct vfio_pci_core_device, vdev); 1656 struct pci_dev *pdev = vdev->pdev; 1657 unsigned int index = pgoff >> (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT); 1658 unsigned long req_start; 1659 size_t phys_len; 1660 1661 /* Currently, only bars 0-5 supports huge pfnmap */ 1662 if (index >= VFIO_PCI_ROM_REGION_INDEX) 1663 return 0; 1664 1665 /* 1666 * NOTE: we're keeping things simple as of now, assuming the 1667 * physical address of BARs (aka, pci_resource_start(pdev, index)) 1668 * should always be aligned with pgoff in vfio-pci's address space. 1669 */ > 1670 req_start = (pgoff << PAGE_SHIFT) & ((1UL << VFIO_PCI_OFFSET_SHIFT) - 1); 1671 phys_len = PAGE_ALIGN(pci_resource_len(pdev, index)); 1672 1673 /* 1674 * If this happens, it will probably fail mmap() later.. mapping 1675 * hint isn't important anymore. 1676 */ 1677 if (req_start >= phys_len) 1678 return 0; 1679 1680 phys_len = MIN(phys_len - req_start, len); 1681 1682 if (IS_ENABLED(CONFIG_ARCH_SUPPORTS_PUD_PFNMAP) && phys_len >= PUD_SIZE) 1683 return PUD_ORDER; 1684 1685 if (IS_ENABLED(CONFIG_ARCH_SUPPORTS_PMD_PFNMAP) && phys_len >= PMD_SIZE) 1686 return PMD_ORDER; 1687 1688 return 0; 1689 } 1690 EXPORT_SYMBOL_GPL(vfio_pci_core_get_mapping_order); 1691 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki