Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / arch / powerpc / include / asm / device.h

diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h
index 9dade15d1ab48c8475bc912752b57cc047a90226..6d94d27ed850a7110627f943398e65b885665075 100644 (file)
--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h
@@ -15,7 +15,16 @@ struct dev_archdata {
 
        /* DMA operations on that device */
        struct dma_map_ops      *dma_ops;
-       void                    *dma_data;
+
+       /*
+        * When an iommu is in use, dma_data is used as a ptr to the base of the
+        * iommu_table.  Otherwise, it is a simple numerical offset.
+        */
+       union {
+               dma_addr_t      dma_offset;
+               void            *iommu_table_base;
+       } dma_data;
+
 #ifdef CONFIG_SWIOTLB
        dma_addr_t              max_direct_dma_addr;
 #endif