autofs: copy autofs4 to autofs

Copy source files from the autofs4 directory to the autofs directory.

Link: http://lkml.kernel.org/r/152626705013.28589.931913083997578251.stgit@pluto.themaw.net
Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/autofs/symlink.c

@@ -0,0 +1,29 @@
+/*
+ * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
+ *
+ * This file is part of the Linux kernel and is made available under
+ * the terms of the GNU General Public License, version 2, or at your
+ * option, any later version, incorporated herein by reference.
+ */
+
+#include "autofs_i.h"
+
+static const char *autofs_get_link(struct dentry *dentry,
+				   struct inode *inode,
+				   struct delayed_call *done)
+{
+	struct autofs_sb_info *sbi;
+	struct autofs_info *ino;
+
+	if (!dentry)
+		return ERR_PTR(-ECHILD);
+	sbi = autofs_sbi(dentry->d_sb);
+	ino = autofs_dentry_ino(dentry);
+	if (ino && !autofs_oz_mode(sbi))
+		ino->last_used = jiffies;
+	return d_inode(dentry)->i_private;
+}
+
+const struct inode_operations autofs_symlink_inode_operations = {
+	.get_link	= autofs_get_link
+};