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mm: use VMA flag helpers in NUMA balancing
[mm: use VMA flag helpers in NUMA balancing] Use vma_test() instead of accessing vm_flags directly in the NUMA balancing code touched by the preceding fixes. Keep the existing flag predicates unchange
[mm: use VMA flag helpers in NUMA balancing] Use vma_test() instead of accessing vm_flags directly in the NUMA balancing code touched by the preceding fixes. Keep the existing flag predicates unchange