Update x86 DMA API implementation to take GFP_ flags

arch/i386/kernel/pci-dma.c

@@ -14,10 +14,11 @@
 #include <asm/io.h>
 
 void *dma_alloc_coherent(struct device *dev, size_t size,
-			   dma_addr_t *dma_handle)
+			   dma_addr_t *dma_handle, int gfp)
 {
 	void *ret;
-	int gfp = GFP_ATOMIC;
+	/* ignore region specifiers */
+	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
 
 	if (dev == NULL || (*dev->dma_mask < 0xffffffff))
 		gfp |= GFP_DMA;

include/asm-i386/dma-mapping.h

@@ -3,11 +3,11 @@
 
 #include <asm/cache.h>
 
-#define dma_alloc_noncoherent(d, s, h) dma_alloc_coherent(d, s, h)
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 
 void *dma_alloc_coherent(struct device *dev, size_t size,
-			   dma_addr_t *dma_handle);
+			   dma_addr_t *dma_handle, int flag);
 
 void dma_free_coherent(struct device *dev, size_t size,
 			 void *vaddr, dma_addr_t dma_handle);