diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 01d7071b23f7..cdd760d39e7c 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -675,27 +675,11 @@ static void __init gateway_init(void)
 
 static void __init parisc_bootmem_free(void)
 {
-	unsigned long zones_size[MAX_NR_ZONES] = { 0, };
-	unsigned long holes_size[MAX_NR_ZONES] = { 0, };
-	unsigned long mem_start_pfn = ~0UL, mem_end_pfn = 0, mem_size_pfn = 0;
-	int i;
+	unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0, };
 
-	for (i = 0; i < npmem_ranges; i++) {
-		unsigned long start = pmem_ranges[i].start_pfn;
-		unsigned long size = pmem_ranges[i].pages;
-		unsigned long end = start + size;
+	max_zone_pfn[0] = memblock_end_of_DRAM();
 
-		if (mem_start_pfn > start)
-			mem_start_pfn = start;
-		if (mem_end_pfn < end)
-			mem_end_pfn = end;
-		mem_size_pfn += size;
-	}
-
-	zones_size[0] = mem_end_pfn - mem_start_pfn;
-	holes_size[0] = zones_size[0] - mem_size_pfn;
-
-	free_area_init_node(0, zones_size, mem_start_pfn, holes_size);
+	free_area_init(max_zone_pfn);
 }
 
 void __init paging_init(void)