[PATCH 4.8 081/125] mm/hugetlb: improve locking in dissolve_free_huge_pages()

4.8-stable review patch. If anyone has any objections, please let me know. -- From: Gerald Schaefer commit eb03aa008561004257900983193d024e57abdd96 upstream. For every pfn aligned to minimum_order, dissolve_free_huge_pages() will call

[PATCH 4.8 081/125] mm/hugetlb: improve locking in dissolve_free_huge_pages()

4.8-stable review patch. If anyone has any objections, please let me know. -- From: Gerald Schaefer commit eb03aa008561004257900983193d024e57abdd96 upstream. For every pfn aligned to minimum_order, dissolve_free_huge_pages() will call dissolve_free_huge_page() which takes the