powerpc: use asm-generic/scatterlist.h

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/powerpc/Kconfig

@@ -663,6 +663,9 @@ config ZONE_DMA
 config NEED_DMA_MAP_STATE
 	def_bool (PPC64 || NOT_COHERENT_CACHE)
 
+config NEED_SG_DMA_LENGTH
+	def_bool y
+
 config GENERIC_ISA_DMA
 	bool
 	depends on PPC64 || POWER4 || 6xx && !CPM2

arch/powerpc/include/asm/scatterlist.h

@@ -9,38 +9,11 @@
  * 2 of the License, or (at your option) any later version.
  */
 
-#ifdef __KERNEL__
-#include <linux/types.h>
 #include <asm/dma.h>
-
+#include <asm-generic/scatterlist.h>
-struct scatterlist {
-#ifdef CONFIG_DEBUG_SG
-	unsigned long sg_magic;
-#endif
-	unsigned long page_link;
-	unsigned int offset;
-	unsigned int length;
-
-	/* For TCE or SWIOTLB support */
-	dma_addr_t dma_address;
-	u32 dma_length;
-};
-
-/*
- * These macros should be used after a dma_map_sg call has been done
- * to get bus addresses of each of the SG entries and their lengths.
- * You should only work with the number of sg entries pci_map_sg
- * returns, or alternatively stop on the first sg_dma_len(sg) which
- * is 0.
- */
-#define sg_dma_address(sg)	((sg)->dma_address)
-#define sg_dma_len(sg)		((sg)->dma_length)
 
 #ifdef __powerpc64__
 #define ISA_DMA_THRESHOLD	(~0UL)
 #endif
 
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_SCATTERLIST_H */