[U-Boot] SPDX License status

[Wolfgang Denk <wd@denx.de>]

Dear Tom,

In message <20170825012557.GK2827@bill-the-cat> you wrote:
> 
> Actual code we have to take care with anyhow, but it's still up to the
> person that has to handle the syncing.

Really?  Should we not rather implement a common, consistent policy
for the whole project?

Our patch submission already include a rule for new code [1]:

        If you add new files, please always make sure that these
        contain your copyright note and a GPLv2+
        SPDX-License-Identifier, for example like this:

	(C) Copyright 2010  Joe Hacker <jh@hackers.paradise.com>

	SPDX-License-Identifier:	GPL-2.0+

Should we not ask the same for code merged from other projects?

[1] Bullet #3 in http://www.denx.de/wiki/view/U-Boot/Patches#Attributing_Code_Copyrights_Sign

Best regards,

Wolfgang Denk

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