diff options
Diffstat (limited to 'mm/truncate.c')
| -rw-r--r-- | mm/truncate.c | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/mm/truncate.c b/mm/truncate.c index 8e3aa9e8618e..1d516e51e29d 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -266,9 +266,22 @@ int generic_error_remove_page(struct address_space *mapping, struct page *page) } EXPORT_SYMBOL(generic_error_remove_page); -static long mapping_evict_folio(struct address_space *mapping, - struct folio *folio) +/** + * mapping_evict_folio() - Remove an unused folio from the page-cache. + * @mapping: The mapping this folio belongs to. + * @folio: The folio to remove. + * + * Safely remove one folio from the page cache. + * It only drops clean, unused folios. + * + * Context: Folio must be locked. + * Return: The number of pages successfully removed. + */ +long mapping_evict_folio(struct address_space *mapping, struct folio *folio) { + /* The page may have been truncated before it was locked */ + if (!mapping) + return 0; if (folio_test_dirty(folio) || folio_test_writeback(folio)) return 0; /* The refcount will be elevated if any page in the folio is mapped */ @@ -281,25 +294,11 @@ static long mapping_evict_folio(struct address_space *mapping, return remove_mapping(mapping, folio); } -/** - * invalidate_inode_page() - Remove an unused page from the pagecache. - * @page: The page to remove. - * - * Safely invalidate one page from its pagecache mapping. - * It only drops clean, unused pages. - * - * Context: Page must be locked. - * Return: The number of pages successfully removed. - */ long invalidate_inode_page(struct page *page) { struct folio *folio = page_folio(page); - struct address_space *mapping = folio_mapping(folio); - /* The page may have been truncated before it was locked */ - if (!mapping) - return 0; - return mapping_evict_folio(mapping, folio); + return mapping_evict_folio(folio_mapping(folio), folio); } /** |