From fbabfd0f4ee2e8847bf56edf481249ad1bb8c44d Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sat, 9 May 2015 15:54:49 -0500 Subject: [PATCH] fs: Add helper functions for permanently empty directories. To ensure it is safe to mount proc and sysfs I need to check if filesystems that are mounted on top of them are mounted on truly empty directories. Given that some directories can gain entries over time, knowing that a directory is empty right now is insufficient. Therefore add supporting infrastructure for permantently empty directories that proc and sysfs can use when they create mount points for filesystems and fs_fully_visible can use to test for permanently empty directories to ensure that nothing will be gained by mounting a fresh copy of proc or sysfs. Cc: stable@vger.kernel.org Signed-off-by: "Eric W. Biederman" --- Reading git-format-patch failed