smb: Do not test the return value of folio_start_writeback()

In preparation for removing the return value entirely, stop testing it
in smb.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
index 2108b3b40ce92eea0714563faf87fbf8e82240f1..5dc36dc2e76b4a71aab8630148ebf51377a28d98 100644 (file)
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -2705,8 +2705,7 @@ 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);
@@ -2741,8 +2740,7 @@ 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);