Hi Zhen, [auto build test WARNING on iommu/next] [also build test WARNING on v4.13-rc1] [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/Robin-Murphy/Optimise-64-bit-IOVA-allocations/20170719-060847 base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: arm-multi_v7_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm All warnings (new ones prefixed by >>): drivers/iommu/iova.c: In function 'init_iova_domain': >> drivers/iommu/iova.c:53:41: warning: large integer implicitly truncated to >> unsigned type [-Woverflow] iovad->dma_32bit_pfn = iova_pfn(iovad, 1ULL << 32); ^~~~ vim +53 drivers/iommu/iova.c 35 36 void 37 init_iova_domain(struct iova_domain *iovad, unsigned long granule, 38 unsigned long start_pfn) 39 { 40 /* 41 * IOVA granularity will normally be equal to the smallest 42 * supported IOMMU page size; both *must* be capable of 43 * representing individual CPU pages exactly. 44 */ 45 BUG_ON((granule > PAGE_SIZE) || !is_power_of_2(granule)); 46 47 spin_lock_init(&iovad->iova_rbtree_lock); 48 iovad->rbroot = RB_ROOT; 49 iovad->cached_node = NULL; 50 iovad->cached32_node = NULL; 51 iovad->granule = granule; 52 iovad->start_pfn = start_pfn; > 53 iovad->dma_32bit_pfn = iova_pfn(iovad, 1ULL << 32); 54 init_iova_rcaches(iovad); 55 } 56 EXPORT_SYMBOL_GPL(init_iova_domain); 57 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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