x86: use dma_length in i386

This is done to get the code closer to x86_64.
Signed-off-by: NGlauber Costa <gcosta@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/pci-base_32.c

@@ -24,6 +24,7 @@ static int pci32_dma_map_sg(struct device *dev, struct scatterlist *sglist,
 		BUG_ON(!sg_page(sg));
 
 		sg->dma_address = sg_phys(sg);
+		sg->dma_length = sg->length;
 	}
 
 	flush_write_buffers();

include/asm-x86/scatterlist.h

@@ -11,9 +11,7 @@ struct scatterlist {
 	unsigned int	offset;
 	unsigned int	length;
 	dma_addr_t	dma_address;
-#ifdef CONFIG_X86_64
 	unsigned int	dma_length;
-#endif
 };
 
 #define ARCH_HAS_SG_CHAIN