1 files changed, 7 insertions, 6 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index f89141982702..0a6e94ab8339 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -897,6 +897,13 @@ void __init setup_arch(char **cmdline_p)
 
         reserve_brk();
 
+#ifdef CONFIG_ACPI_SLEEP
+        /*
+         * Reserve low memory region for sleep support.
+         * even before init_memory_mapping
+         */
+        acpi_reserve_wakeup_memory();
+#endif
         init_gbpages();
 
         /* max_pfn_mapped is updated here */
@@ -948,12 +955,6 @@ void __init setup_arch(char **cmdline_p)
 
         initmem_init(0, max_pfn, acpi, k8);
 
-#ifdef CONFIG_ACPI_SLEEP
-        /*
-         * Reserve low memory region for sleep support.
-         */
-        acpi_reserve_bootmem();
-#endif
         /*
          * Find and reserve possible boot-time SMP configuration:
          */