[PATCH v2, part3 10/12] mm: correctly update zone->mamaged_pages

Enhance adjust_managed_page_count() to adjust totalhigh_pages for highmem pages. And change code which directly adjusts totalram_pages to use adjust_managed_page_count() because it adjusts totalram_pages, totalhigh_pages and zone->managed_pages altogether in a safe way. Remove

[PATCH v2, part3 10/12] mm: correctly update zone-mamaged_pages

Enhance adjust_managed_page_count() to adjust totalhigh_pages for highmem pages. And change code which directly adjusts totalram_pages to use adjust_managed_page_count() because it adjusts totalram_pages, totalhigh_pages and zone-managed_pages altogether in a safe way. Remove