[PATCH 03/20] nilfs2: Convert nilfs_segctor_complete_write to use folios

[Ryusuke Konishi <konishi.ryusuke@gmail.com>]

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

Use the new folio APIs, saving five calls to compound_head().
This includes the last callers of nilfs_end_page_io(), so
remove that too.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
---
 fs/nilfs2/segment.c | 49 +++++++++++++++++++--------------------------
 1 file changed, 21 insertions(+), 28 deletions(-)

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 730062e79bfc..2a058aad5c2d 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1778,13 +1778,6 @@ static void nilfs_end_folio_io(struct folio *folio, int err)
 	folio_end_writeback(folio);
 }
 
-static void nilfs_end_page_io(struct page *page, int err)
-{
-	if (!page)
-		return;
-	nilfs_end_folio_io(page_folio(page), err);
-}
-
 static void nilfs_abort_logs(struct list_head *logs, int err)
 {
 	struct nilfs_segment_buffer *segbuf;
@@ -1867,7 +1860,7 @@ static void nilfs_set_next_segment(struct the_nilfs *nilfs,
 static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
 {
 	struct nilfs_segment_buffer *segbuf;
-	struct page *bd_page = NULL, *fs_page = NULL;
+	struct folio *bd_folio = NULL, *fs_folio = NULL;
 	struct the_nilfs *nilfs = sci->sc_super->s_fs_info;
 	int update_sr = false;
 
@@ -1878,21 +1871,21 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
 				    b_assoc_buffers) {
 			set_buffer_uptodate(bh);
 			clear_buffer_dirty(bh);
-			if (bh->b_page != bd_page) {
-				if (bd_page)
-					end_page_writeback(bd_page);
-				bd_page = bh->b_page;
+			if (bh->b_folio != bd_folio) {
+				if (bd_folio)
+					folio_end_writeback(bd_folio);
+				bd_folio = bh->b_folio;
 			}
 		}
 		/*
-		 * We assume that the buffers which belong to the same page
+		 * We assume that the buffers which belong to the same folio
 		 * continue over the buffer list.
-		 * Under this assumption, the last BHs of pages is
-		 * identifiable by the discontinuity of bh->b_page
-		 * (page != fs_page).
+		 * Under this assumption, the last BHs of folios is
+		 * identifiable by the discontinuity of bh->b_folio
+		 * (folio != fs_folio).
 		 *
 		 * For B-tree node blocks, however, this assumption is not
-		 * guaranteed.  The cleanup code of B-tree node pages needs
+		 * guaranteed.  The cleanup code of B-tree node folios needs
 		 * special care.
 		 */
 		list_for_each_entry(bh, &segbuf->sb_payload_buffers,
@@ -1905,16 +1898,16 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
 
 			set_mask_bits(&bh->b_state, clear_bits, set_bits);
 			if (bh == segbuf->sb_super_root) {
-				if (bh->b_page != bd_page) {
-					end_page_writeback(bd_page);
-					bd_page = bh->b_page;
+				if (bh->b_folio != bd_folio) {
+					folio_end_writeback(bd_folio);
+					bd_folio = bh->b_folio;
 				}
 				update_sr = true;
 				break;
 			}
-			if (bh->b_page != fs_page) {
-				nilfs_end_page_io(fs_page, 0);
-				fs_page = bh->b_page;
+			if (bh->b_folio != fs_folio) {
+				nilfs_end_folio_io(fs_folio, 0);
+				fs_folio = bh->b_folio;
 			}
 		}
 
@@ -1928,13 +1921,13 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
 		}
 	}
 	/*
-	 * Since pages may continue over multiple segment buffers,
-	 * end of the last page must be checked outside of the loop.
+	 * Since folios may continue over multiple segment buffers,
+	 * end of the last folio must be checked outside of the loop.
 	 */
-	if (bd_page)
-		end_page_writeback(bd_page);
+	if (bd_folio)
+		folio_end_writeback(bd_folio);
 
-	nilfs_end_page_io(fs_page, 0);
+	nilfs_end_folio_io(fs_folio, 0);
 
 	nilfs_drop_collected_inodes(&sci->sc_dirty_files);
 
-- 
2.34.1