arm64: cmpxchg: implement cmpxchg64_relaxed

[~andy/linux] / mm / migrate.c

diff --git a/mm/migrate.c b/mm/migrate.c
index d3137375fa80e401c4ead5db5c60152cfe3f8f7a..a26bccd44ccb0a907662c08135399462bd816b9c 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -107,7 +107,7 @@ void putback_movable_pages(struct list_head *l)
                list_del(&page->lru);
                dec_zone_page_state(page, NR_ISOLATED_ANON +
                                page_is_file_cache(page));
-               if (unlikely(balloon_page_movable(page)))
+               if (unlikely(isolated_balloon_page(page)))
                        balloon_page_putback(page);
                else
                        putback_lru_page(page);
@@ -311,7 +311,7 @@ static inline bool buffer_migrate_lock_buffers(struct buffer_head *head,
  * 2 for pages with a mapping
  * 3 for pages with a mapping and PagePrivate/PagePrivate2 set.
  */
-static int migrate_page_move_mapping(struct address_space *mapping,
+int migrate_page_move_mapping(struct address_space *mapping,
                struct page *newpage, struct page *page,
                struct buffer_head *head, enum migrate_mode mode)
 {
@@ -949,6 +949,16 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
        struct page *new_hpage = get_new_page(hpage, private, &result);
        struct anon_vma *anon_vma = NULL;
 
+       /*
+        * Movability of hugepages depends on architectures and hugepage size.
+        * This check is necessary because some callers of hugepage migration
+        * like soft offline and memory hotremove don't walk through page
+        * tables or check whether the hugepage is pmd-based or not before
+        * kicking migration.
+        */
+       if (!hugepage_migration_support(page_hstate(hpage)))
+               return -ENOSYS;
+
        if (!new_hpage)
                return -ENOMEM;
 
@@ -1461,7 +1471,7 @@ static bool migrate_balanced_pgdat(struct pglist_data *pgdat,
                if (!populated_zone(zone))
                        continue;
 
-               if (zone->all_unreclaimable)
+               if (!zone_reclaimable(zone))
                        continue;
 
                /* Avoid waking kswapd by allocating pages_to_migrate pages. */