linux-kernel - Re: [PATCH v39 11/24] x86/sgx: Add SGX enclave driver

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Message-ID: <20201005200228.GA43617@linux.intel.com>
Date:   Mon, 5 Oct 2020 23:02:28 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Christoph Hellwig <hch@...radead.org>, x86@...nel.org,
        linux-sgx@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jethro Beekman <jethro@...tanix.com>,
        Haitao Huang <haitao.huang@...ux.intel.com>,
        Chunyang Hui <sanqian.hcy@...fin.com>,
        Jordan Hand <jorhand@...ux.microsoft.com>,
        Nathaniel McCallum <npmccallum@...hat.com>,
        Seth Moore <sethmo@...gle.com>,
        Darren Kenny <darren.kenny@...cle.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Suresh Siddha <suresh.b.siddha@...el.com>,
        andriy.shevchenko@...ux.intel.com, asapek@...gle.com, bp@...en8.de,
        cedric.xing@...el.com, chenalexchen@...gle.com,
        conradparker@...gle.com, cyhanish@...gle.com,
        haitao.huang@...el.com, kai.huang@...el.com, kai.svahn@...el.com,
        kmoy@...gle.com, ludloff@...gle.com, luto@...nel.org,
        nhorman@...hat.com, puiterwijk@...hat.com, rientjes@...gle.com,
        tglx@...utronix.de, yaozhangx@...gle.com, mikko.ylinen@...el.com
Subject: Re: [PATCH v39 11/24] x86/sgx: Add SGX enclave driver

On Mon, Oct 05, 2020 at 09:40:52AM -0700, Dave Hansen wrote:
> On 10/5/20 8:02 AM, Greg KH wrote:
> > On Mon, Oct 05, 2020 at 05:23:45PM +0300, Jarkko Sakkinen wrote:
> >> [*] One thing I've been wondering for a long time is that, why new code
> >> should have the copyright platters in the first place? I get it for
> >> pre-Git era but now there is a cryptographic log of authority.
> > Go talk to your corporate lawyers about this, it is one of the most
> > common cargo-cult patterns around :)
> 
> For this patch, though, it seems like we should just update the dates
> instead of removing them.

Already done. I updated them yesterday as:

  Copyright(c) 2016-20 Intel Corporation.

Changing from '//' to '/* ... */' is not yet.

> If I look at the last 1000 "^+.*Copyright" lines added to the kernel,
> 997 of them have a year.  So, weird or not, it's a pretty standard
> convention.  We'd need a slightly more broad conversation before we
> decide to nix these dates.
> 
> Pure speculation: Copyright protection, at least in the US, is not
> forever.  I _think_ it's 75 years or something.  That protection starts
> when the work is created and is independent of when it gets merged into
> Linux.  So, if we did something weird like merge a driver written 10
> years ago, it would only be protected for 65 more years after we merge
> it.  In other words, git history _might_ be irrelevant for copyright
> protection.

/Jarkko