linux-next: build failure after merge of the origin tree

Hi Linus,

In Linus' tree, today's linux-next build (powerpc ppc64_defconfig) failed
like this:

arch/powerpc/platforms/pseries/hotplug-memory.c: In function 'pseries_remove_memblock':
arch/powerpc/platforms/pseries/hotplug-memory.c:103:17: error: unused variable 'pfn' [-Werror=unused-variable]

Caused by commit d760afd4d257 ("memory-hotplug: suppress "Trying to free
nonexistent resource <XXXXXXXXXXXXXXXX-YYYYYYYYYYYYYYYY>" warning").

I can't see what the point of the "pfn" variable is and this patch never
appeared in linux-next before being merged.  :-(

I have reverted that commit for today.

If this patch truly was authored yesterday (according the Author Date in
git), why was it merged yesterday while still under discussion?  And the
latest update to it still has this build problem ... did anyone even try
to build this for powerpc (since that architecture was obviously
affected)?  (Cross compilers available here
http://www.kernel.org/pub/tools/crosstool/).

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au