Use the filemap_end_dropbehind() helper rather than calling
folio_unmap_invalidate() directly, as we need to check if the folio has
been redirtied or marked for writeback once the folio lock has been
re-acquired.
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Trond Myklebust <trondmy@xxxxxxxxxxxxxxx>
Fixes: 8026e49bff9b ("mm/filemap: add read support for RWF_DONTCACHE")
Link: https://lore.kernel.org/linux-fsdevel/ba8a9805331ce258a622feaca266b163db681a10.camel@xxxxxxxxxxxxxxx/
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
---
mm/filemap.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 008a55290f34..6af6d8f2929c 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2644,8 +2644,7 @@ static inline bool pos_same_folio(loff_t pos1, loff_t pos2, struct folio *folio)
return (pos1 >> shift == pos2 >> shift);
}
-static void filemap_end_dropbehind_read(struct address_space *mapping,
- struct folio *folio)
+static void filemap_end_dropbehind_read(struct folio *folio)
{
if (!folio_test_dropbehind(folio))
return;
@@ -2653,7 +2652,7 @@ static void filemap_end_dropbehind_read(struct address_space *mapping,
return;
if (folio_trylock(folio)) {
if (folio_test_clear_dropbehind(folio))
- folio_unmap_invalidate(mapping, folio, 0);
+ filemap_end_dropbehind(folio);
folio_unlock(folio);
}
}
@@ -2774,7 +2773,7 @@ ssize_t filemap_read(struct kiocb *iocb, struct iov_iter *iter,
for (i = 0; i < folio_batch_count(&fbatch); i++) {
struct folio *folio = fbatch.folios[i];
- filemap_end_dropbehind_read(mapping, folio);
+ filemap_end_dropbehind_read(folio);
folio_put(folio);
}
folio_batch_init(&fbatch);
--
2.49.0
