1 files changed, 11 insertions, 9 deletions

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index e5ab4362322f..2fee782077c1 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -212,6 +212,10 @@ static void __init arm_bootmem_init(unsigned long start_pfn,
 }
 
 #ifdef CONFIG_ZONE_DMA
+
+unsigned long arm_dma_zone_size __read_mostly;
+EXPORT_SYMBOL(arm_dma_zone_size);
+
 /*
  * The DMA mask corresponding to the maximum bus address allocatable
  * using GFP_DMA.  The default here places no restriction on DMA
@@ -275,19 +279,17 @@ static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
 #endif
         }
 
-#ifdef ARM_DMA_ZONE_SIZE
-#ifndef CONFIG_ZONE_DMA
-#error ARM_DMA_ZONE_SIZE set but no DMA zone to limit allocations
-#endif
-
+#ifdef CONFIG_ZONE_DMA
         /*
          * Adjust the sizes according to any special requirements for
          * this machine type.
          */
-        arm_adjust_dma_zone(zone_size, zhole_size,
-                ARM_DMA_ZONE_SIZE >> PAGE_SHIFT);
-
-        arm_dma_limit = PHYS_OFFSET + ARM_DMA_ZONE_SIZE - 1;
+        if (arm_dma_zone_size) {
+                arm_adjust_dma_zone(zone_size, zhole_size,
+                        arm_dma_zone_size >> PAGE_SHIFT);
+                arm_dma_limit = PHYS_OFFSET + arm_dma_zone_size - 1;
+        } else
+                arm_dma_limit = 0xffffffff;
 #endif
 
         free_area_init_node(0, zone_size, min, zhole_size);