m68knommu: mark all RAM as ZONE_DMA

There is no reason not to put all RAM in ZONE_DMA for these simple
m68k varients (same as the standard MMU m68k code does). With this
in place the usual dma_alloc_coherent() work as expected.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

diff --git a/arch/m68knommu/mm/init.c b/arch/m68knommu/mm/init.c
index 3bf249c..7befc0c 100644 (file)
--- a/arch/m68knommu/mm/init.c
+++ b/arch/m68knommu/mm/init.c
@@ -111,11 +111,7 @@ void __init paging_init(void)
        {
                unsigned long zones_size[MAX_NR_ZONES] = {0, };
 
-               zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;
-               zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
-#ifdef CONFIG_HIGHMEM
-               zones_size[ZONE_HIGHMEM] = 0;
-#endif
+               zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
                free_area_init(zones_size);
        }
 }