diff --git a/arch/x86/include/asm/init.h b/arch/x86/include/asm/init.h
new file mode 100644
index 0000000000000000000000000000000000000000..36fb1a6a510908553465fbef97785464b83c0879
--- /dev/null
+++ b/arch/x86/include/asm/init.h
@@ -0,0 +1,18 @@
+#ifndef _ASM_X86_INIT_32_H
+#define _ASM_X86_INIT_32_H
+
+#ifdef CONFIG_X86_32
+extern void __init early_ioremap_page_table_range_init(void);
+#endif
+
+extern unsigned long __init
+kernel_physical_mapping_init(unsigned long start,
+			     unsigned long end,
+			     unsigned long page_size_mask);
+
+
+extern unsigned long __initdata e820_table_start;
+extern unsigned long __meminitdata e820_table_end;
+extern unsigned long __meminitdata e820_table_top;
+
+#endif /* _ASM_X86_INIT_32_H */
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 6475693a81abb6dfd1dae300a4e2e33ceb96931d..6d63e3d1253d057a4a443b5f779c90daf108ef99 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -3,21 +3,13 @@
 
 #include <asm/cacheflush.h>
 #include <asm/e820.h>
+#include <asm/init.h>
 #include <asm/page.h>
 #include <asm/page_types.h>
 #include <asm/sections.h>
 #include <asm/system.h>
 #include <asm/tlbflush.h>
 
-#ifdef CONFIG_X86_32
-extern void __init early_ioremap_page_table_range_init(void);
-#endif
-
-extern unsigned long __init
-kernel_physical_mapping_init(unsigned long start,
-			     unsigned long end,
-			     unsigned long page_size_mask);
-
 unsigned long __initdata e820_table_start;
 unsigned long __meminitdata e820_table_end;
 unsigned long __meminitdata e820_table_top;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 5ca9c6c3439ed5fc015bf61a1943f1147d059ce0..1669693e97de59e5714a8798327a6d63ab3aaaf3 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -49,6 +49,7 @@
 #include <asm/paravirt.h>
 #include <asm/setup.h>
 #include <asm/cacheflush.h>
+#include <asm/init.h>
 
 unsigned long max_low_pfn_mapped;
 unsigned long max_pfn_mapped;
@@ -58,11 +59,6 @@ unsigned long highstart_pfn, highend_pfn;
 
 static noinline int do_test_wp_bit(void);
 
-
-extern unsigned long __initdata e820_table_start;
-extern unsigned long __meminitdata e820_table_end;
-extern unsigned long __meminitdata e820_table_top;
-
 static __init void *alloc_low_page(void)
 {
 	unsigned long pfn = e820_table_end++;
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index f441ae31631229644331d2f162ac09b0f7156cc0..7dd7ce49d69bc967f0358a932d0d43200f9cd79f 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -48,6 +48,7 @@
 #include <asm/kdebug.h>
 #include <asm/numa.h>
 #include <asm/cacheflush.h>
+#include <asm/init.h>
 
 /*
  * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
@@ -283,10 +284,6 @@ void __init cleanup_highmap(void)
 	}
 }
 
-extern unsigned long __initdata e820_table_start;
-extern unsigned long __meminitdata e820_table_end;
-extern unsigned long __meminitdata e820_table_top;
-
 static __ref void *alloc_low_page(unsigned long *phys)
 {
 	unsigned long pfn = e820_table_end++;