dma-mapping: remove the dma_direct_set_offset export

Drop the dma_direct_set_offset export and move the declaration to
dma-map-ops.h now that the Allwinner drivers have stopped calling it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMaxime Ripard <maxime@cerno.tech>

arch/arm/mach-keystone/keystone.c

@@ -8,7 +8,7 @@
  */
 #include <linux/io.h>
 #include <linux/of.h>
-#include <linux/dma-mapping.h>
+#include <linux/dma-map-ops.h>
 #include <linux/init.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>

arch/arm/mach-omap1/usb.c

@@ -9,7 +9,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
+#include <linux/dma-map-ops.h>
 #include <linux/io.h>
 
 #include <asm/irq.h>

arch/sh/drivers/pci/pcie-sh7786.c

@@ -12,7 +12,7 @@
 #include <linux/io.h>
 #include <linux/async.h>
 #include <linux/delay.h>
-#include <linux/dma-mapping.h>
+#include <linux/dma-map-ops.h>
 #include <linux/slab.h>
 #include <linux/clk.h>
 #include <linux/sh_clk.h>

arch/x86/pci/sta2x11-fixup.c

@@ -11,7 +11,8 @@
 #include <linux/pci_ids.h>
 #include <linux/export.h>
 #include <linux/list.h>
-#include <linux/dma-direct.h>
+#include <linux/dma-map-ops.h>
+#include <linux/swiotlb.h>
 #include <asm/iommu.h>
 
 #define STA2X11_SWIOTLB_SIZE (4*1024*1024)

include/linux/dma-map-ops.h

@@ -226,6 +226,9 @@ struct page *dma_alloc_from_pool(struct device *dev, size_t size,
 		bool (*phys_addr_ok)(struct device *, phys_addr_t, size_t));
 bool dma_free_from_pool(struct device *dev, void *start, size_t size);
 
+int dma_direct_set_offset(struct device *dev, phys_addr_t cpu_start,
+		dma_addr_t dma_start, u64 size);
+
 #ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H
 #include <asm/dma-coherence.h>
 #elif defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \

include/linux/dma-mapping.h

@@ -558,13 +558,6 @@ static inline int dma_mmap_wc(struct device *dev,
 #define dma_unmap_len_set(PTR, LEN_NAME, VAL)    do { } while (0)
 #endif
 
-/*
- * Legacy interface to set up the dma offset map.  Drivers really should not
- * actually use it, but we have a few legacy cases left.
- */
-int dma_direct_set_offset(struct device *dev, phys_addr_t cpu_start,
-		dma_addr_t dma_start, u64 size);
-
 extern const struct dma_map_ops dma_virt_ops;
 
 #endif /* _LINUX_DMA_MAPPING_H */

kernel/dma/direct.c

@@ -547,4 +547,3 @@ int dma_direct_set_offset(struct device *dev, phys_addr_t cpu_start,
 	dev->dma_range_map = map;
 	return 0;
 }
-EXPORT_SYMBOL_GPL(dma_direct_set_offset);