2 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index e48cafcf92ae..bacf4b0d91f4 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1706,3 +1706,9 @@ int __acpi_release_global_lock(unsigned int *lock)
 	} while (unlikely (val != old));
 	return old & 0x1;
 }
+
+void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
+{
+	e820_add_region(addr, size, E820_ACPI);
+	update_e820();
+}
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index c228322ca180..23ddd558fbd5 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -952,6 +952,10 @@ void __init setup_arch(char **cmdline_p)
 
 	reserve_initrd();
 
+#if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD)
+	acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start);
+#endif
+
 	reserve_crashkernel();
 
 	vsmp_init();