diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pagemap.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 4cc170949e9c..55b254d951da 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -375,6 +375,19 @@ static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask) #define MAX_PAGECACHE_ORDER min(MAX_XAS_ORDER, PREFERRED_MAX_PAGECACHE_ORDER) /* + * mapping_max_folio_size_supported() - Check the max folio size supported + * + * The filesystem should call this function at mount time if there is a + * requirement on the folio mapping size in the page cache. + */ +static inline size_t mapping_max_folio_size_supported(void) +{ + if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) + return 1U << (PAGE_SHIFT + MAX_PAGECACHE_ORDER); + return PAGE_SIZE; +} + +/* * mapping_set_folio_order_range() - Set the orders supported by a file. * @mapping: The address space of the file. * @min: Minimum folio order (between 0-MAX_PAGECACHE_ORDER inclusive). |