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From: "Rodney W. Grimes" <freebsd@pdx.rh.CN85.dnsmgr.net>
Message-Id: <201711301744.vAUHi3c1024693@pdx.rh.CN85.dnsmgr.net>
Subject: Re: svn commit: r326403 - in head/sys: arm64/include ddb dev/fb
 dev/mc146818
 mips/include powerpc/include powerpc/powerpc riscv/include sparc64/include vm
In-Reply-To: <201711301548.vAUFmaGu072114@repo.freebsd.org>
To: "Pedro F. Giffuni" <pfg@freebsd.org>
Date: Thu, 30 Nov 2017 09:44:03 -0800 (PST)
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[ Charset UTF-8 unsupported, converting... ]
> Author: pfg
> Date: Thu Nov 30 15:48:35 2017
> New Revision: 326403
> URL: https://svnweb.freebsd.org/changeset/base/326403
> 
> Log:
>   SPDX: Consider code from Carnegie-Mellon University.
>   
>   Interesting cases, most likely from CMU Mach sources.

I can confirm that infact most of this code did infact come from
the Mach project, as that is where ddb and the vm system came
from in the later UCB BSD releases.

Then it appears files got copied into the other archs
when those ports occured.

> Modified:
>   head/sys/arm64/include/profile.h
...

> + * SPDX-License-Identifier: (BSD-4-Clause AND MIT-CMU)
> + *
>   * Copyright (c) 1991 Regents of the University of California.
>   * All rights reserved.
>   * Copyright (c) 1994 John S. Dyson

HUmmmm.. Just noticed this as I was deleting the body of the
original mail, shouldnt this get a different identifier?  I
suspect many of those files have either Dyson or Greenman or
both on them as copyrights.

-- 
Rod Grimes                                                 rgrimes@freebsd.org