diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index caff528..1a49ab5 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -85,4 +85,7 @@
 	return tsk->nsproxy->pid_ns->child_reaper;
 }
 
+void pidhash_init(void);
+void pidmap_init(void);
+
 #endif /* _LINUX_PID_NS_H */
diff --git a/init/main.c b/init/main.c
index 2769dc0..0604cbc 100644
--- a/init/main.c
+++ b/init/main.c
@@ -87,8 +87,6 @@
 extern void fork_init(unsigned long);
 extern void mca_init(void);
 extern void sbus_init(void);
-extern void pidhash_init(void);
-extern void pidmap_init(void);
 extern void prio_tree_init(void);
 extern void radix_tree_init(void);
 extern void free_initmem(void);