[PATCH RFC 5/6] mm/filemap: reinitialize folio->_mapcount directly

[David Hildenbrand <david@redhat.com>]

Let's get rid of the page_mapcount_reset() call and simply reinitialize
folio->_mapcount directly.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 mm/filemap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 382c3d06bfb1..c4ac7289e88a 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -177,7 +177,7 @@ static void filemap_unaccount_folio(struct address_space *mapping,
 				 * and we'd rather not leak it: if we're wrong,
 				 * another bad page check should catch it later.
 				 */
-				page_mapcount_reset(&folio->page);
+				atomic_set(&folio->_mapcount, -1);
 				folio_ref_sub(folio, mapcount);
 			}
 		}
-- 
2.45.0