Hi Yong, [auto build test WARNING on iommu/next] [also build test WARNING on next-20170823] [cannot apply to v4.13-rc6] [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/Yong-Wu/MT2712-IOMMU-SUPPORT/20170824-074750 base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: arm-allmodconfig (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 >>): In file included from include/linux/kernel.h:10:0, from include/linux/list.h:8, from include/linux/preempt.h:10, from include/linux/spinlock.h:50, from include/linux/mmzone.h:7, from include/linux/bootmem.h:7, from drivers/iommu/mtk_iommu.c:14: drivers/iommu/mtk_iommu.c: In function 'mtk_iommu_iova_to_phys': include/linux/bitops.h:6:24: warning: left shift count >= width of type [-Wshift-count-overflow] #define BIT(nr) (1UL << (nr)) ^ >> drivers/iommu/mtk_iommu.c:407:9: note: in expansion of macro 'BIT' pa |= BIT(32); ^~~ drivers/iommu/mtk_iommu.c: In function 'mtk_iommu_hw_init': drivers/iommu/mtk_iommu.c:536:30: error: 'const struct mtk_iommu_data' has no member named 'm4u_type'; did you mean 'm4u_dom'? if (data->enable_4GB && data->m4u_type != M4U_MT8173) { ^~ In file included from include/linux/kernel.h:10:0, from include/linux/list.h:8, from include/linux/preempt.h:10, from include/linux/spinlock.h:50, from include/linux/mmzone.h:7, from include/linux/bootmem.h:7, from drivers/iommu/mtk_iommu.c:14: drivers/iommu/mtk_iommu.c: In function 'mtk_iommu_probe': include/linux/bitops.h:6:24: warning: left shift count >= width of type [-Wshift-count-overflow] #define BIT(nr) (1UL << (nr)) ^ drivers/iommu/mtk_iommu.c:589:35: note: in expansion of macro 'BIT' data->enable_4GB = !!(max_pfn > (BIT(32) >> PAGE_SHIFT)); ^~~ vim +/BIT +407 drivers/iommu/mtk_iommu.c 393 394 static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain, 395 dma_addr_t iova) 396 { 397 struct mtk_iommu_domain *dom = to_mtk_domain(domain); 398 struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); 399 unsigned long flags; 400 phys_addr_t pa; 401 402 spin_lock_irqsave(&dom->pgtlock, flags); 403 pa = dom->iop->iova_to_phys(dom->iop, iova); 404 spin_unlock_irqrestore(&dom->pgtlock, flags); 405 406 if (data->enable_4GB) > 407 pa |= BIT(32); 408 409 return pa; 410 } 411 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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