New code for 6.0:

- Remove iomap_writepage and all callers, since the mm apparently never
    called the zonefs or gfs2 writepage functions.
 
 Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Merge tag 'iomap-6.0-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull more iomap updates from Darrick Wong:
 "In the past 10 days or so I've not heard any ZOMG STOP style
  complaints about removing ->writepage support from gfs2 or zonefs, so
  here's the pull request removing them (and the underlying fs iomap
  support) from the kernel:

   - Remove iomap_writepage and all callers, since the mm apparently
     never called the zonefs or gfs2 writepage functions"

* tag 'iomap-6.0-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  iomap: remove iomap_writepage
  zonefs: remove ->writepage
  gfs2: remove ->writepage
  gfs2: stop using generic_writepages in gfs2_ail1_start_one

fs/gfs2/aops.c

@@ -81,31 +81,6 @@ static int gfs2_get_block_noalloc(struct inode *inode, sector_t lblock,
 	return 0;
 }
 
-/**
- * gfs2_writepage - Write page for writeback mappings
- * @page: The page
- * @wbc: The writeback control
- */
-static int gfs2_writepage(struct page *page, struct writeback_control *wbc)
-{
-	struct inode *inode = page->mapping->host;
-	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_sbd *sdp = GFS2_SB(inode);
-	struct iomap_writepage_ctx wpc = { };
-
-	if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl)))
-		goto out;
-	if (current->journal_info)
-		goto redirty;
-	return iomap_writepage(page, wbc, &wpc, &gfs2_writeback_ops);
-
-redirty:
-	redirty_page_for_writepage(wbc, page);
-out:
-	unlock_page(page);
-	return 0;
-}
-
 /**
  * gfs2_write_jdata_page - gfs2 jdata-specific version of block_write_full_page
  * @page: The page to write
@@ -765,7 +740,6 @@ cannot_release:
 }
 
 static const struct address_space_operations gfs2_aops = {
-	.writepage = gfs2_writepage,
 	.writepages = gfs2_writepages,
 	.read_folio = gfs2_read_folio,
 	.readahead = gfs2_readahead,

fs/gfs2/log.c

@@ -131,7 +131,7 @@ __acquires(&sdp->sd_ail_lock)
 		if (!mapping)
 			continue;
 		spin_unlock(&sdp->sd_ail_lock);
-		ret = generic_writepages(mapping, wbc);
+		ret = filemap_fdatawrite_wbc(mapping, wbc);
 		if (need_resched()) {
 			blk_finish_plug(plug);
 			cond_resched();
@@ -222,8 +222,7 @@ out:
 	spin_unlock(&sdp->sd_ail_lock);
 	blk_finish_plug(&plug);
 	if (ret) {
-		gfs2_lm(sdp, "gfs2_ail1_start_one (generic_writepages) "
+		gfs2_lm(sdp, "gfs2_ail1_start_one returned: %d\n", ret);
-			"returned: %d\n", ret);
 		gfs2_withdraw(sdp);
 	}
 	trace_gfs2_ail_flush(sdp, wbc, 0);

fs/iomap/buffered-io.c

@@ -1528,21 +1528,6 @@ unlock:
 	return 0;
 }
 
-int
-iomap_writepage(struct page *page, struct writeback_control *wbc,
-		struct iomap_writepage_ctx *wpc,
-		const struct iomap_writeback_ops *ops)
-{
-	int ret;
-
-	wpc->ops = ops;
-	ret = iomap_do_writepage(page, wbc, wpc);
-	if (!wpc->ioend)
-		return ret;
-	return iomap_submit_ioend(wpc, wpc->ioend, ret);
-}
-EXPORT_SYMBOL_GPL(iomap_writepage);
-
 int
 iomap_writepages(struct address_space *mapping, struct writeback_control *wbc,
 		struct iomap_writepage_ctx *wpc,

fs/zonefs/super.c

@@ -231,13 +231,6 @@ static const struct iomap_writeback_ops zonefs_writeback_ops = {
 	.map_blocks		= zonefs_write_map_blocks,
 };
 
-static int zonefs_writepage(struct page *page, struct writeback_control *wbc)
-{
-	struct iomap_writepage_ctx wpc = { };
-
-	return iomap_writepage(page, wbc, &wpc, &zonefs_writeback_ops);
-}
-
 static int zonefs_writepages(struct address_space *mapping,
 			     struct writeback_control *wbc)
 {
@@ -265,7 +258,6 @@ static int zonefs_swap_activate(struct swap_info_struct *sis,
 static const struct address_space_operations zonefs_file_aops = {
 	.read_folio		= zonefs_read_folio,
 	.readahead		= zonefs_readahead,
-	.writepage		= zonefs_writepage,
 	.writepages		= zonefs_writepages,
 	.dirty_folio		= filemap_dirty_folio,
 	.release_folio		= iomap_release_folio,

include/linux/iomap.h

@@ -297,9 +297,6 @@ void iomap_finish_ioends(struct iomap_ioend *ioend, int error);
 void iomap_ioend_try_merge(struct iomap_ioend *ioend,
 		struct list_head *more_ioends);
 void iomap_sort_ioends(struct list_head *ioend_list);
-int iomap_writepage(struct page *page, struct writeback_control *wbc,
-		struct iomap_writepage_ctx *wpc,
-		const struct iomap_writeback_ops *ops);
 int iomap_writepages(struct address_space *mapping,
 		struct writeback_control *wbc, struct iomap_writepage_ctx *wpc,
 		const struct iomap_writeback_ops *ops);