#include <linux/dma-mapping.h> #include <linux/export.h> /* Set this to 1 if there is a HW IOMMU in the system */ int iommu_detected __read_mostly; struct dma_map_ops *dma_ops; EXPORT_SYMBOL(dma_ops); #define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16) static int __init dma_init(void) { dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES); return 0; } fs_initcall(dma_init); struct dma_map_ops *dma_get_ops(struct device *dev) { return dma_ops; } EXPORT_SYMBOL(dma_get_ops);