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Date:   Tue, 29 May 2018 16:51:44 -0400
From:   "Theodore Y. Ts'o" <tytso@mit.edu>
To:     Kent Overstreet <kent.overstreet@gmail.com>
Cc:     "Luis R. Rodriguez" <mcgrof@do-not-panic.com>,
        Coly Li <colyli@suse.de>,
        Ciaran Farrell <ciaran.farrell@suse.com>,
        One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
        linux-bcache@vger.kernel.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Philippe Ombredanne <pombredanne@nexb.com>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        Jonas Oberg <jonas@fsfe.org>
Subject: Re: PostgreSQL licensed code on Linux
Message-ID: <20180529205143.GB7381@thunk.org>
Mail-Followup-To: "Theodore Y. Ts'o" <tytso@mit.edu>,
        Kent Overstreet <kent.overstreet@gmail.com>,
        "Luis R. Rodriguez" <mcgrof@do-not-panic.com>,
        Coly Li <colyli@suse.de>, Ciaran Farrell <ciaran.farrell@suse.com>,
        One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
        linux-bcache@vger.kernel.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Philippe Ombredanne <pombredanne@nexb.com>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        Jonas Oberg <jonas@fsfe.org>
References: <CAB=NE6XGCM0nZqvq74JPnSKgvL37Nkwvr3H3cAQ=ooTYJt7Rdg@mail.gmail.com>
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On Tue, May 29, 2018 at 03:26:43PM -0400, Kent Overstreet wrote:
> > That seems to indicate that we've had already PostgreSQL licensed code on
> > Linux since Kent's addition of bcache to Linux in 2013. The portion of code
> > is rather small though, to me it seems to cover only crc_table[],
> > bch_crc64_update(), and bch_crc64().
>
> > As silly as it may be we should split out the PostgreSQL licensed code from
> > drivers/md/bcache/util.c into its own file and while at it clarify the
> > license.

While we're at it maybe we should move the crc-64 code to lib and/or
crypto, alongside our support for crc-8, crc-16, and crc-32
algorithms?  That way if there are other potential users for crc-64,
they will be less likely to re-invent the wheel....

     	     	  	    	      	  - Ted