From c771d683a62e5d36bc46036f5c07f4f5bb7dda61 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Fri, 24 Oct 2014 00:14:36 +0200
Subject: [PATCH] vfs: introduce clone_private_mount()

Overlayfs needs a private clone of the mount, so create a function for
this and export to modules.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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