diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 585000c98d3e57ff1a3c88fa34342b91536f2e53..bb8c69079c788a89eae5f49f76881ccb5ce241f5 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -40,10 +40,10 @@
  * user can e.g. boot the original kernel with mem=1G while still booting the
  * next kernel with full memory.
  */
-static struct e820map initial_e820;
-static struct e820map initial_e820_saved;
-struct e820map *e820 = &initial_e820;
-struct e820map *e820_saved = &initial_e820_saved;
+static struct e820map initial_e820  __initdata;
+static struct e820map initial_e820_saved  __initdata;
+struct e820map *e820 __refdata = &initial_e820;
+struct e820map *e820_saved __refdata = &initial_e820_saved;
 
 /* For PCI or other memory-mapped resources */
 unsigned long pci_mem_start = 0xaeedbabe;
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 167deae767cb80d960b62c5208f4f030e2e13951..22af912d66d258f413414c7355ac82da2814b074 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -699,9 +699,9 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
 	}
 }
 
-void free_initmem(void)
+void __ref free_initmem(void)
 {
-	/* e820_reallocate_tables(); - disabled for now */
+	e820_reallocate_tables();
 
 	free_init_pages("unused kernel",
 			(unsigned long)(&__init_begin),