linux-kernel - [PATCH 6.6 495/638] smb: do not test the return value of folio_start

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Date: Sun, 24 Mar 2024 18:58:52 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
	David Howells <dhowells@...hat.com>,
	Steve French <sfrench@...ba.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.6 495/638] smb: do not test the return value of folio_start_writeback()

From: "Matthew Wilcox (Oracle)" <willy@...radead.org>

[ 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@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Cc: David Howells <dhowells@...hat.com>
Cc: Steve French <sfrench@...ba.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Stable-dep-of: f3dc1bdb6b0b ("cifs: Fix writeback data corruption")
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/smb/client/file.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

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);
-- 
2.43.0