Hi all,

After merging the folio tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

mm/page_vma_mapped.c: In function 'page_vma_mapped_walk':
mm/page_vma_mapped.c:219:48: error: implicit declaration of function 'pmd_pfn'; did you mean 'pmd_off'? [-Werror=implicit-function-declaration]
  219 |                                 if (!check_pmd(pmd_pfn(pmde), pvmw))
      |                                                ^~~~~~~
      |                                                pmd_off

Caused by commit

  02ecfe9b9580 ("mm: Convert page_vma_mapped_walk to work on PFNs")

Presumably you need to explicitly include <linux/pgtable.h>?

I have used the folio tree from next-20220204 for today.

-- 
Cheers,
Stephen Rothwell