diff --git a/arch/x86/include/asm/dmi.h b/arch/x86/include/asm/dmi.h
index aa32f7e6c197..fd8f9e2ca35f 100644
--- a/arch/x86/include/asm/dmi.h
+++ b/arch/x86/include/asm/dmi.h
@@ -1,10 +1,13 @@
 #ifndef _ASM_X86_DMI_H
 #define _ASM_X86_DMI_H
 
+#include <linux/compiler.h>
+#include <linux/init.h>
+
 #include <asm/io.h>
 #include <asm/setup.h>
 
-static inline void *dmi_alloc(unsigned len)
+static __always_inline __init void *dmi_alloc(unsigned len)
 {
 	return extend_brk(len, sizeof(int));
 }