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diff --git a/target/linux/atheros-2.6/files/include/asm-mips/mach-atheros/dma-coherence.h b/target/linux/atheros-2.6/files/include/asm-mips/mach-atheros/dma-coherence.h
deleted file mode 100644
index 34e5a8507..000000000
--- a/target/linux/atheros-2.6/files/include/asm-mips/mach-atheros/dma-coherence.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2006  Ralf Baechle <ralf@linux-mips.org>
- * Copyright (C) 2007  Felix Fietkau <nbd@openwrt.org>
- *
- */
-#ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
-#define __ASM_MACH_GENERIC_DMA_COHERENCE_H
-
-#if 0
-#define PCI_DMA_OFFSET	0x20000000
-#else
-#define PCI_DMA_OFFSET	0x00000000
-#endif
-
-struct device;
-
-static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
-{
-	return virt_to_phys(addr) + (dev != NULL ? PCI_DMA_OFFSET : 0);
-}
-
-static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
-{
-	return page_to_phys(page) + (dev != NULL ? PCI_DMA_OFFSET : 0);
-}
-
-static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
-{
-	return (dma_addr > PCI_DMA_OFFSET ? dma_addr - PCI_DMA_OFFSET : dma_addr);
-}
-
-static void plat_unmap_dma_mem(dma_addr_t dma_addr)
-{
-}
-
-static inline int plat_device_is_coherent(struct device *dev)
-{
-	return 0;
-}
-
-#endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */