diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index 000cf03751fe9fd88280ea6938837c3f49126cac..519e63c3c1306abb1a59b31e017d76e4e671b01d 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -1083,16 +1083,15 @@ static unsigned long __init setup_memory(void)
 
 void __init zone_sizes_init(void)
 {
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] =
+		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 #ifdef CONFIG_HIGHMEM
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {
-			virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT,
-			max_low_pfn,
-			highend_pfn};
+	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
 	add_active_range(0, 0, highend_pfn);
 #else
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {
-			virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT,
-			max_low_pfn};
 	add_active_range(0, 0, max_low_pfn);
 #endif
 
diff --git a/arch/i386/mm/discontig.c b/arch/i386/mm/discontig.c
index 455597db84dffe2d078db1011d21653a8568650c..ddbdb0336f28f1c6d4d303d11055a929b7daf286 100644
--- a/arch/i386/mm/discontig.c
+++ b/arch/i386/mm/discontig.c
@@ -356,11 +356,12 @@ void __init numa_kva_reserve(void)
 void __init zone_sizes_init(void)
 {
 	int nid;
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {
-		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT,
-		max_low_pfn,
-		highend_pfn
-	};
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] =
+		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
 
 	/* If SRAT has not registered memory, register it now */
 	if (find_max_pfn_with_active_regions() == 0) {
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index daf977ff2920e2c88aee4c6398a7d135bc22d802..82deaa3a7c4806adecb70daacdbfc7d2997105e0 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -233,6 +233,7 @@ paging_init (void)
 	efi_memmap_walk(count_pages, &num_physpages);
 
 	max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 	max_zone_pfns[ZONE_DMA] = max_dma;
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index d497b6b0f5b2c08d4be5cd50478399db993a2dc8..96722cb1b49ddbc296951fa1007b2f418d910dea 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -709,6 +709,7 @@ void __init paging_init(void)
 			max_pfn = mem_data[node].max_pfn;
 	}
 
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 	max_zone_pfns[ZONE_DMA] = max_dma;
 	max_zone_pfns[ZONE_NORMAL] = max_pfn;
 	free_area_init_nodes(max_zone_pfns);
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 16fe027bbc12ffb873222dbbdc170d474028ca91..d1c0758c56110628e5cc691263f48d1eda36bbb9 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -307,11 +307,12 @@ void __init paging_init(void)
 	       top_of_ram, total_ram);
 	printk(KERN_DEBUG "Memory hole size: %ldMB\n",
 	       (top_of_ram - total_ram) >> 20);
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 #ifdef CONFIG_HIGHMEM
-	max_zone_pfns[0] = total_lowmem >> PAGE_SHIFT;
-	max_zone_pfns[1] = top_of_ram >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_DMA] = total_lowmem >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_HIGHMEM] = top_of_ram >> PAGE_SHIFT;
 #else
-	max_zone_pfns[0] = top_of_ram >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_DMA] = top_of_ram >> PAGE_SHIFT;
 #endif
 	free_area_init_nodes(max_zone_pfns);
 }
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 43c272075e1ae8408baa35c8e78a2d831e24312c..9da01dc8cfd9d3fc0722de803d7cfbfb9e0ab573 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -617,9 +617,9 @@ void __init do_init_bootmem(void)
 
 void __init paging_init(void)
 {
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {
-				lmb_end_of_DRAM() >> PAGE_SHIFT
-	};
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] = lmb_end_of_DRAM() >> PAGE_SHIFT;
 	free_area_init_nodes(max_zone_pfns);
 }
 
diff --git a/arch/ppc/mm/init.c b/arch/ppc/mm/init.c
index 410200046af120236e44fb35d656e57f65ceb0da..c374e53ae03a0971654d26b5670f0e670b65cf40 100644
--- a/arch/ppc/mm/init.c
+++ b/arch/ppc/mm/init.c
@@ -374,11 +374,12 @@ void __init paging_init(void)
 	end_pfn = start_pfn + (total_memory >> PAGE_SHIFT);
 	add_active_range(0, start_pfn, end_pfn);
 
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 #ifdef CONFIG_HIGHMEM
-	max_zone_pfns[0] = total_lowmem >> PAGE_SHIFT;
-	max_zone_pfns[1] = total_memory >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_DMA] = total_lowmem >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_HIGHMEM] = total_memory >> PAGE_SHIFT;
 #else
-	max_zone_pfns[0] = total_memory >> PAGE_SHIFT;
+	max_zone_pfns[ZONE_DMA] = total_memory >> PAGE_SHIFT;
 #endif /* CONFIG_HIGHMEM */
 	free_area_init_nodes(max_zone_pfns);
 }
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 19c72520a86876a616becaf31ab3d72f73e8bb3f..971dc1181e69ace1620338b845a5f4e5869dee30 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -406,9 +406,12 @@ void __cpuinit zap_low_mappings(int cpu)
 #ifndef CONFIG_NUMA
 void __init paging_init(void)
 {
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = {MAX_DMA_PFN,
-							MAX_DMA32_PFN,
-							end_pfn};
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
+	max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
+	max_zone_pfns[ZONE_NORMAL] = end_pfn;
+
 	memory_present(0, 0, end_pfn);
 	sparse_init();
 	free_area_init_nodes(max_zone_pfns);
diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c
index 829a008bd39b75a95eec6dfb66a46d4497459a48..2ee2e003606cad9cc727042af6ed435dadc45a53 100644
--- a/arch/x86_64/mm/numa.c
+++ b/arch/x86_64/mm/numa.c
@@ -338,9 +338,11 @@ static void __init arch_sparse_init(void)
 void __init paging_init(void)
 { 
 	int i;
-	unsigned long max_zone_pfns[MAX_NR_ZONES] = { MAX_DMA_PFN,
-		MAX_DMA32_PFN,
-		end_pfn};
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+	max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
+	max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
+	max_zone_pfns[ZONE_NORMAL] = end_pfn;
 
 	arch_sparse_init();