[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>

1 files changed, 1 insertions, 16 deletions

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 29bd37b1488..bf0c263cb6f 100644
--- a/arch/sh/mm/init.c
+++ b/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;
@@ -170,8 +169,6 @@ 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. */
@@ -179,19 +176,7 @@ void __init paging_init(void)
 
                 /* 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