diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 9330920265f33d7bbfaacdb72a41b4b50162941a..31d5b22c59a2016acafe1f62ab8d11ed240e0225 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -437,7 +437,7 @@ early_param("mem", early_parse_mem);
  * The device tree may be allocated beyond our memory limit, or inside the
  * crash kernel region for kdump. If so, move it out of the way.
  */
-static void move_device_tree(void)
+static void __init move_device_tree(void)
 {
 	unsigned long start, size;
 	void *p;