From: Christoph Hellwig <hch@lst.de>
Date: Wed, 16 Nov 2022 14:18:35 +0100
Subject: [PATCH] cifs: remove ->writepage
Git-commit: ebaad77c89921c8237ca17791d5462bd289052d0
References: bsc#1190317
Patch-mainline: v6.1

->writepage is a very inefficient method to write back data, and only
used through write_cache_pages or a a fallback when no ->migrate_folio
method is present.  Now that cifs implements ->migrate_folio and
doesn't call generic_writepages, the writepage method can be removed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Enzo Matsumiya <ematsumiya@suse.de>
---
 fs/cifs/file.c |    9 ---------
 1 file changed, 9 deletions(-)

--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2560,13 +2560,6 @@ retry_write:
 	return rc;
 }
 
-static int cifs_writepage(struct page *page, struct writeback_control *wbc)
-{
-	int rc = cifs_writepage_locked(page, wbc);
-	unlock_page(page);
-	return rc;
-}
-
 static int cifs_write_end(struct file *file, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned copied,
 			struct page *page, void *fsdata)
@@ -4955,7 +4948,6 @@ static void cifs_swap_deactivate(struct
 const struct address_space_operations cifs_addr_ops = {
 	.readpage = cifs_readpage,
 	.readpages = cifs_readpages,
-	.writepage = cifs_writepage,
 	.writepages = cifs_writepages,
 	.write_begin = cifs_write_begin,
 	.write_end = cifs_write_end,
@@ -4980,7 +4972,6 @@ const struct address_space_operations ci
  */
 const struct address_space_operations cifs_addr_ops_smallbuf = {
 	.readpage = cifs_readpage,
-	.writepage = cifs_writepage,
 	.writepages = cifs_writepages,
 	.write_begin = cifs_write_begin,
 	.write_end = cifs_write_end,