linux-kernel - linux-next: build failure after merge of the akpm-current tree

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Date:   Wed, 20 Jan 2021 16:25:18 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the akpm-current tree

Hi all,

After merging the akpm-current tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

mm/memory_hotplug.c: In function 'move_pfn_range_to_zone':
mm/memory_hotplug.c:772:24: error: 'ZONE_DEVICE' undeclared (first use in this function)
  772 |  if (zone_idx(zone) == ZONE_DEVICE) {
      |                        ^~~~~~~~~~~

Caused by commit

  e821cf25cfee ("mm: teach pfn_to_online_page() about ZONE_DEVICE section collisions")

I applied the patch from Randy Dunlap for today.

That, however, lead to this warning:

mm/memory_hotplug.c:730:13: warning: 'section_taint_zone_device' defined but not used [-Wunused-function]
  730 | static void section_taint_zone_device(unsigned long pfn)
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~

-- 
Cheers,
Stephen Rothwell

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