[PATCH] optional ZONE_DMA: remove ZONE_DMA remains from sh/sh64

sh / sh64: Remove ZONE_DMA remains.

Both arches do not need ZONE_DMA

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/sh/mm/init.c

@@ -158,7 +158,6 @@ void __init paging_init(void)
 	 * Setup some defaults for the zone sizes.. these should be safe
 	 * regardless of distcontiguous memory or MMU settings.
 	 */
-	zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;
 	zones_size[ZONE_NORMAL] = __MEMORY_SIZE >> PAGE_SHIFT;
 #ifdef CONFIG_HIGHMEM
 	zones_size[ZONE_HIGHMEM] = 0 >> PAGE_SHIFT;
@@ -170,28 +169,14 @@ void __init paging_init(void)
 	 * the zone sizes accordingly, in addition to turning it on.
 	 */
 	{
-		unsigned long max_dma, low, start_pfn;
-
 		/* We don't need to map the kernel through the TLB, as
 		 * it is permanatly mapped using P1. So clear the
 		 * entire pgd. */
 		memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));
 
 		/* Turn on the MMU */
 		enable_mmu();
-
-		/* Fixup the zone sizes */
-		start_pfn = START_PFN;
-		max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
-		low = MAX_LOW_PFN;
-
-		if (low < max_dma) {
-			zones_size[ZONE_DMA] = low - start_pfn;
-			zones_size[ZONE_NORMAL] = 0;
-		} else {
-			zones_size[ZONE_DMA] = max_dma - start_pfn;
-			zones_size[ZONE_NORMAL] = low - max_dma;
-		}
+		zones_size[ZONE_NORMAL] = MAX_LOW_PFN - START_PFN;
 	}
 
 	/* Set an initial value for the MMU.TTB so we don't have to

arch/sh64/Kconfig

@@ -36,9 +36,6 @@ config GENERIC_CALIBRATE_DELAY
 config RWSEM_XCHGADD_ALGORITHM
 	bool
 
-config GENERIC_ISA_DMA
-	bool
-
 config ARCH_HAS_ILOG2_U32
 	bool
 	default n

arch/sh64/mm/init.c

@@ -118,10 +118,7 @@ void __init paging_init(void)
 
 	mmu_context_cache = MMU_CONTEXT_FIRST_VERSION;
 
-        /*
-	 * All memory is good as ZONE_NORMAL (fall-through) and ZONE_DMA.
-         */
-	zones_size[ZONE_DMA] = MAX_LOW_PFN - START_PFN;
+	zones_size[ZONE_NORMAL] = MAX_LOW_PFN - START_PFN;
 	NODE_DATA(0)->node_mem_map = NULL;
 	free_area_init_node(0, NODE_DATA(0), zones_size, __MEMORY_START >> PAGE_SHIFT, 0);
 }