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

[Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>]

Hi Andrew,

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

mm/khugepaged.c: In function 'khugepaged':
mm/khugepaged.c:1757:31: warning: 'vma' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (khugepaged_test_exit(mm) || !vma) {
                               ^
mm/khugepaged.c:1659:25: note: 'vma' was declared here
  struct vm_area_struct *vma;
                         ^

Introduced by commit

  0951b59acf3a ("mm: thp: use down_read_trylock() in khugepaged to avoid long block")

-- 
Cheers,
Stephen Rothwell
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