Hi Jason, kernel test robot noticed the following build warnings: [auto build test WARNING on 8e929cb546ee42c9a61d24fae60605e9e3192354] url: https://github.com/intel-lab-lkp/linux/commits/Jason-Gunthorpe/iommu-io-pgtable-arm-Remove-split-on-unmap-behavior/20241105-014356 base: 8e929cb546ee42c9a61d24fae60605e9e3192354 patch link: https://lore.kernel.org/r/3-v2-fd55d00a60b2%2Bc69-arm_no_split_jgg%40nvidia.com patch subject: [PATCH v2 3/3] iommu: Add a kdoc to iommu_unmap() config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20241105/202411051125.mlgeWlEm-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241105/202411051125.mlgeWlEm-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202411051125.mlgeWlEm-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/iommu/iommu.c:2605: warning: Function parameter or struct member 'size' not described in 'iommu_unmap' >> drivers/iommu/iommu.c:2605: warning: Excess function parameter 'len' description in 'iommu_unmap' vim +2605 drivers/iommu/iommu.c add02cfdc9bc29 drivers/iommu/iommu.c Joerg Roedel 2017-08-23 2588 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2589 /** 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2590 * iommu_unmap() - Remove mappings from a range of IOVA 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2591 * @domain: Domain to manipulate 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2592 * @iova: IO virtual address to start 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2593 * @len: Length of the range starting from @iova 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2594 * 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2595 * iommu_unmap() will remove a translation created by iommu_map(). It cannot 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2596 * subdivide a mapping created by iommu_map(), so it should be called with IOVA 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2597 * ranges that match what was passed to iommu_map(). The range can aggregate 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2598 * contiguous iommu_map() calls so long as no individual range is split. 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2599 * 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2600 * Returns: Number of bytes of IOVA unmapped. iova + res will be the point 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2601 * unmapping stopped. 6aa7e03e9dd8b5 drivers/iommu/iommu.c Jason Gunthorpe 2024-11-04 2602 */ add02cfdc9bc29 drivers/iommu/iommu.c Joerg Roedel 2017-08-23 2603 size_t iommu_unmap(struct iommu_domain *domain, add02cfdc9bc29 drivers/iommu/iommu.c Joerg Roedel 2017-08-23 2604 unsigned long iova, size_t size) add02cfdc9bc29 drivers/iommu/iommu.c Joerg Roedel 2017-08-23 @2605 { a7d20dc19d9ea7 drivers/iommu/iommu.c Will Deacon 2019-07-02 2606 struct iommu_iotlb_gather iotlb_gather; a7d20dc19d9ea7 drivers/iommu/iommu.c Will Deacon 2019-07-02 2607 size_t ret; a7d20dc19d9ea7 drivers/iommu/iommu.c Will Deacon 2019-07-02 2608 a7d20dc19d9ea7 drivers/iommu/iommu.c Will Deacon 2019-07-02 2609 iommu_iotlb_gather_init(&iotlb_gather); a7d20dc19d9ea7 drivers/iommu/iommu.c Will Deacon 2019-07-02 2610 ret = __iommu_unmap(domain, iova, size, &iotlb_gather); aae4c8e27bd756 drivers/iommu/iommu.c Tom Murphy 2020-08-17 2611 iommu_iotlb_sync(domain, &iotlb_gather); a7d20dc19d9ea7 drivers/iommu/iommu.c Will Deacon 2019-07-02 2612 a7d20dc19d9ea7 drivers/iommu/iommu.c Will Deacon 2019-07-02 2613 return ret; add02cfdc9bc29 drivers/iommu/iommu.c Joerg Roedel 2017-08-23 2614 } cefc53c7f49424 drivers/base/iommu.c Joerg Roedel 2010-01-08 2615 EXPORT_SYMBOL_GPL(iommu_unmap); 1460432cb513f0 drivers/iommu/iommu.c Alex Williamson 2011-10-21 2616 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
