Project appears to be unlicensed

[saltedcoffii]

This source code doesn't have a license, as far as I can tell. According to https://choosealicense.com/no-permission/, a project without a license is "all rights reserved" and prohibits users from compiling/distributing binaries of this software. Please add a license. There is a relatively exhaustive list at https://choosealicense.com/appendix. Also, by adding a license this (depending on the license) allows third parties such as unix-like distributions to package this software and distribute binaries. Thank you for your consideration!
DISCLAIMER: I'm not a laywer, this isn't legal advice.

[tianon]

I suppose a LICENSE file at the top level would probably make sense, but this was created specifically for Debian (as a so called "native package"), so the license information is in debian/copyright:

cgroupfs-mount/debian/copyright

Lines 6 to 9 in 0549428

	Files: *
	Copyright: 2012 Serge Hallyn <serge.hallyn@ubuntu.com>
	2014 Tianon Gravi <tianon@debian.org>
	License: GPL-3+

(GPL-3+)

[tianon]

Fixed in ebe0530, thanks!