diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h
index 97e6007e4eddf487fabe7b65815308477e4f6063..bce688d54c12383e29b360bb7688b3fc9d385830 100644
--- a/arch/x86/include/asm/page_types.h
+++ b/arch/x86/include/asm/page_types.h
@@ -54,8 +54,6 @@ static inline phys_addr_t get_max_mapped(void)
 extern unsigned long init_memory_mapping(unsigned long start,
 					 unsigned long end);
 
-void init_memory_mapping_high(void);
-
 extern void initmem_init(void);
 extern void free_initmem(void);
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 46e684f85b36bd98568b1296aeeb6a79d4a55768..c3a606c41ce0ef81eaf70606f70bcfa85c6b83df 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -963,6 +963,14 @@ void __init setup_arch(char **cmdline_p)
 	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
 	max_pfn_mapped = max_low_pfn_mapped;
 
+#ifdef CONFIG_X86_64
+	if (max_pfn > max_low_pfn) {
+		max_pfn_mapped = init_memory_mapping(1UL<<32,
+						     max_pfn<<PAGE_SHIFT);
+		/* can we preseve max_low_pfn ?*/
+		max_low_pfn = max_pfn;
+	}
+#endif
 	memblock.current_limit = get_max_mapped();
 
 	/*
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 470cc4704a9aa8bfda1c655506b1deb87f393c2d..c8813aa39740c22c8d3c9c716b81a82a571de1d5 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -606,63 +606,9 @@ kernel_physical_mapping_init(unsigned long start,
 void __init initmem_init(void)
 {
 	memblock_x86_register_active_regions(0, 0, max_pfn);
-	init_memory_mapping_high();
 }
 #endif
 
-struct mapping_work_data {
-	unsigned long start;
-	unsigned long end;
-	unsigned long pfn_mapped;
-};
-
-static int __init_refok
-mapping_work_fn(unsigned long start_pfn, unsigned long end_pfn, void *datax)
-{
-	struct mapping_work_data *data = datax;
-	unsigned long pfn_mapped;
-	unsigned long final_start, final_end;
-
-	final_start = max_t(unsigned long, start_pfn<<PAGE_SHIFT, data->start);
-	final_end = min_t(unsigned long, end_pfn<<PAGE_SHIFT, data->end);
-
-	if (final_end <= final_start)
-		return 0;
-
-	pfn_mapped = init_memory_mapping(final_start, final_end);
-
-	if (pfn_mapped > data->pfn_mapped)
-		data->pfn_mapped = pfn_mapped;
-
-	return 0;
-}
-
-static unsigned long __init_refok
-init_memory_mapping_active_regions(unsigned long start, unsigned long end)
-{
-	struct mapping_work_data data;
-
-	data.start = start;
-	data.end = end;
-	data.pfn_mapped = 0;
-
-	work_with_active_regions(MAX_NUMNODES, mapping_work_fn, &data);
-
-	return data.pfn_mapped;
-}
-
-void __init_refok init_memory_mapping_high(void)
-{
-	if (max_pfn > max_low_pfn) {
-		max_pfn_mapped = init_memory_mapping_active_regions(1UL<<32,
-							 max_pfn<<PAGE_SHIFT);
-		/* can we preserve max_low_pfn ? */
-		max_low_pfn = max_pfn;
-
-		memblock.current_limit = get_max_mapped();
-	}
-}
-
 void __init paging_init(void)
 {
 	unsigned long max_zone_pfns[MAX_NR_ZONES];
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 74064e8ae79fd17b1d5253859b6433d1f722c8e0..86491ba568d92e480903a06d6a4ec9061bfc9c1f 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -543,8 +543,6 @@ static int __init numa_register_memblks(struct numa_meminfo *mi)
 	if (!numa_meminfo_cover_memory(mi))
 		return -EINVAL;
 
-	init_memory_mapping_high();
-
 	/* Finally register nodes. */
 	for_each_node_mask(nid, node_possible_map) {
 		u64 start = (u64)max_pfn << PAGE_SHIFT;