help: why can't my hand-rolled kernel mount an LVM root FS?

[Andy Whitcroft]

On Wed, Jul 07, 2010 at 05:06:00AM -0400, Robert P. J. Day wrote:
> On Wed, 7 Jul 2010, Andy Whitcroft wrote:
> 
> > On Wed, Jul 07, 2010 at 03:49:34AM -0400, Robert P. J. Day wrote:
> 
> ... snip ...
> 
> > > ====== making target debian/stamp/build/kernel [new prereqs: vars]======
> > > This is kernel package version 12.032.
> > > The changelog says we are creating 2.6.35-rc4-rday
> > > However, I thought the version is 2.6.35-rc4-rday+
> > > exit 1
> > > make: *** [debian/stamp/build/kernel] Error 1
> > >
> > >   i'm used to seeing that "+" suffix as a version control identifier
> > > (or something like that).  so ... is there a reason that using the
> > > lucid tree would work fine, but the maverick tree produces the above?
> > >
> > >   the lucid tree is probably just fine for my purposes, now i'm just
> > > curious.  and i clearly have much reading to do.
> >
> > That is a bug in the upstream kernel code, I have a patch in -rc4
> > which should mitigate that.
> 
>   sorry, a couple followup questions.  you're saying that that patch
> is *already* in -rc4?  upstream?  because i'm using the latest pull of
> the upstream kernel tree as the basis for this and i'm still getting
> that error.
> 
>   also, as a quick workaround, i'm assuming that i can just checkout
> the latest tag so that i'm working with a tagged commit and that error
> won't occur.  at least that *seems* to solve the problem but it's
> obviously not ideal.
> 
> rday
> 
> p.s.  just to recap what i tried earlier to make sure i'm on the right
> track, i'm following along here:
> 
>   https://wiki.ubuntu.com/KernelTeam/GitKernelBuild
> 
> i've checked stuff out so i have the following set of directories:
> 
>   $ ls
>   linux-2.6  ubuntu-maverick  ubuntu-package
>   $
> 
> both the upstream kernel tree linux-2.6 and the ubuntu-maverick
> checkout are fully up to date, and since the linux-2.6 checkout is not
> a tagged commit, i'll get the above error with a version mismatch when
> i try to build.
> 
>   as a quick workaround for now, i'll checkout the upstream tag
> v2.6.35-rc4 in linuc-2.6 and try again, and now it's building, but
> ideally, i shouldn't have to do that, i just need something to get a
> working kernel sometime today so i can live with that tagged checkout.

With the fix in place you can then build with LOCALVERSION= and the + is
guarenteed to be suppressed.  Normally that is supplied on kernel make
line by the packaging, i am unsure how you would make make-kpkg do the
same.

-apw