make sure that nsproxy_cache is initialized early enough

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index d6a00f3..9aeab4b 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -271,10 +271,8 @@
 	return err;
 }
 
-static int __init nsproxy_cache_init(void)
+int __init nsproxy_cache_init(void)
 {
 	nsproxy_cachep = KMEM_CACHE(nsproxy, SLAB_PANIC);
 	return 0;
 }
-
-module_init(nsproxy_cache_init);