diff --git a/arch/m68k/sun3/sun3dvma.c b/arch/m68k/sun3/sun3dvma.c
index ca57966ec3a2..b37521a5259d 100644
--- a/arch/m68k/sun3/sun3dvma.c
+++ b/arch/m68k/sun3/sun3dvma.c
@@ -6,6 +6,7 @@
  * Contains common routines for sun3/sun3x DVMA management.
  */
 
+#include <linux/bootmem.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -31,7 +32,7 @@ static inline void dvma_unmap_iommu(unsigned long a, int b)
 extern void sun3_dvma_init(void);
 #endif
 
-static unsigned long iommu_use[IOMMU_TOTAL_ENTRIES];
+static unsigned long *iommu_use;
 
 #define dvma_index(baddr) ((baddr - DVMA_START) >> DVMA_PAGE_SHIFT)
 
@@ -266,7 +267,7 @@ void __init dvma_init(void)
 
 	list_add(&(hole->list), &hole_list);
 
-	memset(iommu_use, 0, sizeof(iommu_use));
+	iommu_use = alloc_bootmem(IOMMU_TOTAL_ENTRIES * sizeof(unsigned long));
 
 	dvma_unmap_iommu(DVMA_START, DVMA_SIZE);