Trying to build kernel for ARC with both options CONFIG_COMPILE_TEST and CONFIG_IOMMU_IO_PGTABLE_LPAE enabled (which happened really in "allyesconfig") I'm seeing this: ---------------->8---------------- $ make ARCH=arc ...sic... CC drivers/iommu/io-pgtable-arm.o linux/drivers/iommu/io-pgtable-arm.c: In function ?__arm_lpae_alloc_pages?: linux/drivers/iommu/io-pgtable-arm.c:221:3: error: implicit declaration of function ?dma_map_single? [-Werror=implicit-function-declaration] dma = dma_map_single(dev, pages, size, DMA_TO_DEVICE); ^ linux/drivers/iommu/io-pgtable-arm.c:221:42: error: ?DMA_TO_DEVICE? undeclared (first use in this function) dma = dma_map_single(dev, pages, size, DMA_TO_DEVICE); ^ ---------------->8---------------- and so on. IOMMU_IO_PGTABLE_LPAE depends on DMA API. So io-pgtable-arm.c should include linux/dma-mapping.h. Signed-off-by: Lada Trimasova <ltrimas at synopsys.com> Cc: Alexey Brodkin <abrodkin at synopsys.com> Cc: Vineet Gupta <vgupta at synopsys.com> Cc: Will Deacon <will.deacon at arm.com> Cc: Joerg Roedel <joro at 8bytes.org> --- drivers/iommu/io-pgtable-arm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index 7df9777..0b1aca0 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -25,6 +25,7 @@ #include <linux/sizes.h> #include <linux/slab.h> #include <linux/types.h> +#include <linux/dma-mapping.h> #include <asm/barrier.h> -- 2.5.0
