Bug#797023: Linux kernel FTBFS error for ARCH=s390, CONFIG_SMP=n, and CONFIG_DYNAMIC_DEBUG=y

[Luis Henriques <luis.henriques@canonical.com>]

On Mon, Aug 31, 2015 at 06:47:01PM -0400, Stephen Powell wrote:
> 
> On Thu, 27 Aug 2015 18:06:49 -0400 (EDT), Ben Hutchings wrote:
> > 
> > On Wed, 2015-08-26 at 21:33 -0400, Stephen Powell wrote:
> >> 
> >> The Linux kernel in jessie fails to build from source for
> >> the combination ARCH=s390, CONFIG_SMP=n, and CONFIG_DYNAMIC_DEBUG=y.
> >> Compilation of drivers/s390/char/sclp_early.c fails with a number
> >> of undefined symbols.
> >> 
> >> The problem also exists in the stretch and sid kernels at the time
> >> of this writing.  The following patch fixes the problem for all three
> >> kernel versions:
> >> 
> >> https://git.kernel.org/cgit/linux/kernel/git/s390/linux.git/patch/?id=a313bdc5310dd807655d3ca3eb2219cd65dfe45a
> > 
> > Please mail stable@vger.kernel.org to request that this is included in
> > the relevant stable branches.
> 
> Hello, stable@vger.kernel.org.  Per the above, please include the
> above-referenced git commit in the relevant stable branches.

Thanks Stephen, I believe this is applicable to stable kernels >= 3.13
containing:

commit acf6a004e6a35dad17032e3b7c5a046c29957e65
Author: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Date:   Wed Nov 13 10:38:27 2013 +0100

    s390/sclp: Move early code from sclp_cmd.c to sclp_early.c

I'm queuing this for the next 3.16 kernel release.

Cheers,
--
Luís