diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 314e12b..38f5d63 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -724,7 +724,7 @@
 	return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END);
 }
 
-void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
+void * __init alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
 {
 	return __alloc_bootmem_core(pgdat->bdata, size,
 			SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0);