proper pid{hash,map}_init() prototypes

This patch adds proper prototypes for pid{hash,map}_init() in
include/linux/pid_namespace.h

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 */