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From: Rob Herring <robh@kernel.org>
Date: Thu, 16 Nov 2017 13:44:54 -0600
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Subject: Re: [patch V2 01/11] Documentation: Add license-rules.rst to describe
 how to properly identify file licenses
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linuxfoundation.org>,
        Andrew Morton <akpm@linuxfoundation.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Kate Stewart <kate@linuxfoundation.org>,
        Philippe Ombredanne <pombredanne@nexb.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Christoph Hellwig <hch@lst.de>,
        Russell King <rmk+kernel@armlinux.org.uk>,
        Jonas Oberg <jonas@fsfe.org>, Joe Perches <joe@perches.com>,
        linux-xfs@vger.kernel.org,
        Charlemagne Lasse <charlemagnelasse@gmail.com>,
        Carmen Bianca Bakker <carmenbianca@fsfe.org>
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On Thu, Nov 16, 2017 at 12:33 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> Add a file to the Documentation directory to describe how file licenses
> should be described in all kernel files, using the SPDX identifier, as well
> as where all licenses should be in the kernel source tree for people to
> refer to (LICENSES/).
>
> Thanks to Kate and Greg for review and editing and Jonas for the
> suggestions concerning the meta tags in the licenses files.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> ---

[...]

> +2. Style:
> +
> +   The SPDX license identifier is added in form of a comment.  The comment
> +   style depends on the file type:
> +
> +   ::
> +
> +      C source:   // SPDX-License-Identifier: <SPDX License Expression>
> +      C header:   /* SPDX-License-Identifier: <SPDX License Expression> */
> +      ASM:        /* SPDX-License-Identifier: <SPDX License Expression> */
> +      scripts:    # SPDX-License-Identifier: <SPDX License Expression>
> +      .rst:      .. SPDX-License-Identifier: <SPDX License Expression>

.dts{i}  // SPDX-License-Identifier: <SPDX License Expression>

Or use "DT source"

Rob