This is a note to let you know that I've just added the patch titled
smb: do not test the return value of folio_start_writeback()
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
smb-do-not-test-the-return-value-of-folio_start_writ.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 19bc8cc7051d0b4f135706c4bb8c735d56612be3
Author: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Date: Wed Nov 8 20:46:04 2023 +0000
smb: do not test the return value of folio_start_writeback()
[ Upstream commit a9540e35624d1475f47dbf6353eed8b99936d36e ]
In preparation for removing the return value entirely, stop testing it
in smb.
Link: https://lkml.kernel.org/r/20231108204605.745109-4-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Steve French <sfrench@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Stable-dep-of: f3dc1bdb6b0b ("cifs: Fix writeback data corruption")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
index 4cbb5487bd8d0..043bee4020a91 100644
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -2709,8 +2709,7 @@ static void cifs_extend_writeback(struct address_space *mapping,
*/
if (!folio_clear_dirty_for_io(folio))
WARN_ON(1);
- if (folio_start_writeback(folio))
- WARN_ON(1);
+ folio_start_writeback(folio);
*_count -= folio_nr_pages(folio);
folio_unlock(folio);
@@ -2745,8 +2744,7 @@ static ssize_t cifs_write_back_from_locked_folio(struct address_space *mapping,
int rc;
/* The folio should be locked, dirty and not undergoing writeback. */
- if (folio_start_writeback(folio))
- WARN_ON(1);
+ folio_start_writeback(folio);
count -= folio_nr_pages(folio);
len = folio_size(folio);
