diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 2b9b1bb4c5f28..9e2246e80efd6 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -990,7 +990,7 @@ static struct sched_domain_topology_level powerpc_topology[] = {
 	{ NULL, },
 };
 
-static int init_big_cores(void)
+static int __init init_big_cores(void)
 {
 	int cpu;