Although the OMAP IOMMU driver supports only ARMv7 (32-bit) platforms, it can be compile tested for other architectures, including 64-bit ones. In such case the warning appears:
In file included from drivers/iommu/omap-iommu.c:33:0: drivers/iommu/omap-iommu.c: In function 'omap_iommu_iova_to_phys': >> drivers/iommu/omap-iopgtable.h:44:21: warning: large integer implicitly truncated to unsigned type [-Woverflow] #define IOPTE_MASK (~(IOPTE_SIZE - 1)) ^ >> drivers/iommu/omap-iommu.c:1641:41: note: in expansion of macro 'IOPTE_MASK' ret = omap_iommu_translate(*pte, da, IOPTE_MASK); ^~~~~~~~~~ Fix this by using architecture-depending types in omap_iommu_translate(): 1. Pointer should be cast to unsigned long, 2. Virtual addresses should be cast to dma_addr_t. On 32-bit this will be the same as original code (using u32). On 64-bit it should produce meaningful result, although it does not really matter. Reported-by: kbuild test robot <l...@intel.com> Signed-off-by: Krzysztof Kozlowski <k...@kernel.org> --- Not tested on hardware. --- drivers/iommu/omap-iopgtable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/omap-iopgtable.h b/drivers/iommu/omap-iopgtable.h index 1a4adb59a859..51d74002cc30 100644 --- a/drivers/iommu/omap-iopgtable.h +++ b/drivers/iommu/omap-iopgtable.h @@ -63,7 +63,8 @@ * * va to pa translation */ -static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask) +static inline phys_addr_t omap_iommu_translate(unsigned long d, dma_addr_t va, + dma_addr_t mask) { return (d & mask) | (va & (~mask)); } -- 2.7.4 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu