tile: replace ZONE_DMA with ZONE_DMA32

tile uses ZONE_DMA for allocations below 32-bits.  These days we
name the zone for that ZONE_DMA32, which will allow to use the
dma-direct and generic swiotlb code as-is, so rename it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NChristian König <christian.koenig@amd.com>

arch/tile/Kconfig

@@ -249,7 +249,7 @@ config HIGHMEM
 
 	  If unsure, say "true".
 
-config ZONE_DMA
+config ZONE_DMA32
 	def_bool y
 
 config IOMMU_HELPER

arch/tile/kernel/pci-dma.c

@@ -54,7 +54,7 @@ static void *tile_dma_alloc_coherent(struct device *dev, size_t size,
 	 * which case we will return NULL.  But such devices are uncommon.
 	 */
 	if (dma_mask <= DMA_BIT_MASK(32)) {
-		gfp |= GFP_DMA;
+		gfp |= GFP_DMA32;
 		node = 0;
 	}
 
@@ -513,7 +513,7 @@ static void *tile_swiotlb_alloc_coherent(struct device *dev, size_t size,
 					 dma_addr_t *dma_handle, gfp_t gfp,
 					 unsigned long attrs)
 {
-	gfp |= GFP_DMA;
+	gfp |= GFP_DMA32;
 	return swiotlb_alloc_coherent(dev, size, dma_handle, gfp);
 }
 

arch/tile/kernel/setup.c

@@ -814,11 +814,11 @@ static void __init zone_sizes_init(void)
 #endif
 
 		if (start < dma_end) {
-			zones_size[ZONE_DMA] = min(zones_size[ZONE_NORMAL],
+			zones_size[ZONE_DMA32] = min(zones_size[ZONE_NORMAL],
 						   dma_end - start);
-			zones_size[ZONE_NORMAL] -= zones_size[ZONE_DMA];
+			zones_size[ZONE_NORMAL] -= zones_size[ZONE_DMA32];
 		} else {
-			zones_size[ZONE_DMA] = 0;
+			zones_size[ZONE_DMA32] = 0;
 		}
 
 		/* Take zone metadata from controller 0 if we're isolnode. */
@@ -830,7 +830,7 @@ static void __init zone_sizes_init(void)
 		       PFN_UP(node_percpu[i]));
 
 		/* Track the type of memory on each node */
-		if (zones_size[ZONE_NORMAL] || zones_size[ZONE_DMA])
+		if (zones_size[ZONE_NORMAL] || zones_size[ZONE_DMA32])
 			node_set_state(i, N_NORMAL_MEMORY);
 #ifdef CONFIG_HIGHMEM
 		if (end != start)