diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pagemap.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 6a30916b76e5..1f560aecd9b5 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -280,6 +280,25 @@ static inline void folio_attach_private(struct folio *folio, void *data) } /** + * folio_change_private - Change private data on a folio. + * @folio: Folio to change the data on. + * @data: Data to set on the folio. + * + * Change the private data attached to a folio and return the old + * data. The page must previously have had data attached and the data + * must be detached before the folio will be freed. + * + * Return: Data that was previously attached to the folio. + */ +static inline void *folio_change_private(struct folio *folio, void *data) +{ + void *old = folio_get_private(folio); + + folio->private = data; + return old; +} + +/** * folio_detach_private - Detach private data from a folio. * @folio: Folio to detach data from. * |