switch all procfs directories ->iterate_shared()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index d69e238..5e57c3e 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -790,7 +790,7 @@
 
 static const struct file_operations proc_sys_dir_file_operations = {
 	.read		= generic_read_dir,
-	.iterate	= proc_sys_readdir,
+	.iterate_shared	= proc_sys_readdir,
 	.llseek		= generic_file_llseek,
 };