linux/include/linux/of_iommu.h
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   1#ifndef __OF_IOMMU_H
   2#define __OF_IOMMU_H
   3
   4#ifdef CONFIG_OF_IOMMU
   5
   6extern int of_get_dma_window(struct device_node *dn, const char *prefix,
   7                             int index, unsigned long *busno, dma_addr_t *addr,
   8                             size_t *size);
   9
  10#else
  11
  12static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
  13                            int index, unsigned long *busno, dma_addr_t *addr,
  14                            size_t *size)
  15{
  16        return -EINVAL;
  17}
  18
  19#endif  /* CONFIG_OF_IOMMU */
  20
  21#endif /* __OF_IOMMU_H */
  22
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