diff options
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/mm/internal.h b/mm/internal.h index 0af4c9885424..2ea9a88dcb95 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -622,7 +622,22 @@ static inline void folio_set_order(struct folio *folio, unsigned int order) #endif } -void folio_undo_large_rmappable(struct folio *folio); +void __folio_undo_large_rmappable(struct folio *folio); +static inline void folio_undo_large_rmappable(struct folio *folio) +{ + if (folio_order(folio) <= 1 || !folio_test_large_rmappable(folio)) + return; + + /* + * At this point, there is no one trying to add the folio to + * deferred_list. If folio is not in deferred_list, it's safe + * to check without acquiring the split_queue_lock. + */ + if (data_race(list_empty(&folio->_deferred_list))) + return; + + __folio_undo_large_rmappable(folio); +} static inline struct folio *page_rmappable_folio(struct page *page) { |