linux-kernel - Re: [PATCH] ld-version: fix it on Fedora

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Date:	Sun, 31 Jan 2016 15:05:49 +0000
From:	"Maciej W. Rozycki" <macro@...tec.com>
To:	Alexander Kapshuk <alexander.kapshuk@...il.com>
CC:	Daniel Sanders <Daniel.Sanders@...tec.com>,
	James Hogan <James.Hogan@...tec.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Michal Marek <mmarek@...e.com>,
	"linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>,
	Linux MIPS Mailing List <linux-mips@...ux-mips.org>,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH] ld-version: fix it on Fedora

On Sat, 30 Jan 2016, Maciej W. Rozycki wrote:

> > % echo 2.24.51.20140217 | ld-version.sh
> > 22451000
> 
>  So the above version is a non-release snapshot from the development tree 
> as the repository trunk is switched to x.y+1.51 once a release branch for 
> x.y has been made.  Then the release branch is switched to x.y-1.90 for 
> prereleases, before settling on x.y or x.y.0 (this hasn't been consistent) 
> for the actual base release.  Any subsequent maintenance releases will 
> then have their version set to x.y.1, x.y.2, and so on.  We shouldn't ever 
> rely on versions that are not proper releases.

 I need to correct myself here for unclear notation or off-by-one errors, 
the flow is of course as follows:

    trunk
   x.y-1.51
      |
      |
      |
release branchpoint
      |      \
    x.y.51 x.y-1.90
      |   prerelease
      |       |
      |       |
      v    x.y-1.91
      .   prerelease
      .       |
      .       |
              |
           x.y-1.92
          prerelease
              .
              .
              .
            x.y.0
         base release
              |
              |
              |
            x.y.1
      maintenance release
              |
              |
              |
            x.y.2
      maintenance release
              |
              v
              .
              .
              .

 The revision number is sometimes bumped up on trunk as well, to 52, 53, 
etc., though the criteria are not completely clear to me; perhaps to make 
a trunk snapshot "release".

 And last but not least for non-release builds the snapshot date is 
automatically appended to the version number reported, as seen above.

  Maciej