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

[Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>]

Hi all,

After merging the akpm-current tree, today's linux-next build (arm
multi_v7_defconfig) produced this warning:

fs/proc/task_mmu.c: In function 'pagemap_pmd_range':
fs/proc/task_mmu.c:1444:14: warning: unused variable 'migration' [-Wunused-variable]
 1444 |         bool migration = false;
      |              ^~~~~~~~~

Introduced by commit

  78cff485ae77 ("fs-proc-task_mmuc-dont-read-mapcount-for-migration-entry-v4")

"migration" is only used when CONFIG_TRANSPARENT_HUGEPAGE is defined.

-- 
Cheers,
Stephen Rothwell

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