[PATCH 23/27] f2fs: Convert move_data_page() to use a folio

["Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>]

Fetch a folio from the page cache and use it throughout, saving
eight hidden calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
 fs/f2fs/gc.c | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index faf9fa1c804d..d0fffa2bd9f0 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1449,14 +1449,14 @@ static int move_data_block(struct inode *inode, block_t bidx,
 }
 
 static int move_data_page(struct inode *inode, block_t bidx, int gc_type,
-							unsigned int segno, int off)
+						unsigned int segno, int off)
 {
-	struct page *page;
+	struct folio *folio;
 	int err = 0;
 
-	page = f2fs_get_lock_data_page(inode, bidx, true);
-	if (IS_ERR(page))
-		return PTR_ERR(page);
+	folio = f2fs_get_lock_data_folio(inode, bidx, true);
+	if (IS_ERR(folio))
+		return PTR_ERR(folio);
 
 	if (!check_valid_map(F2FS_I_SB(inode), segno, off)) {
 		err = -ENOENT;
@@ -1468,12 +1468,12 @@ static int move_data_page(struct inode *inode, block_t bidx, int gc_type,
 		goto out;
 
 	if (gc_type == BG_GC) {
-		if (folio_test_writeback(page_folio(page))) {
+		if (folio_test_writeback(folio)) {
 			err = -EAGAIN;
 			goto out;
 		}
-		set_page_dirty(page);
-		set_page_private_gcing(page);
+		folio_mark_dirty(folio);
+		set_page_private_gcing(&folio->page);
 	} else {
 		struct f2fs_io_info fio = {
 			.sbi = F2FS_I_SB(inode),
@@ -1483,37 +1483,37 @@ static int move_data_page(struct inode *inode, block_t bidx, int gc_type,
 			.op = REQ_OP_WRITE,
 			.op_flags = REQ_SYNC,
 			.old_blkaddr = NULL_ADDR,
-			.page = page,
+			.page = &folio->page,
 			.encrypted_page = NULL,
 			.need_lock = LOCK_REQ,
 			.io_type = FS_GC_DATA_IO,
 		};
-		bool is_dirty = PageDirty(page);
+		bool is_dirty = folio_test_dirty(folio);
 
 retry:
-		f2fs_wait_on_page_writeback(page, DATA, true, true);
+		f2fs_folio_wait_writeback(folio, DATA, true, true);
 
-		set_page_dirty(page);
-		if (clear_page_dirty_for_io(page)) {
+		folio_mark_dirty(folio);
+		if (folio_clear_dirty_for_io(folio)) {
 			inode_dec_dirty_pages(inode);
 			f2fs_remove_dirty_inode(inode);
 		}
 
-		set_page_private_gcing(page);
+		set_page_private_gcing(&folio->page);
 
 		err = f2fs_do_write_data_page(&fio);
 		if (err) {
-			clear_page_private_gcing(page);
+			clear_page_private_gcing(&folio->page);
 			if (err == -ENOMEM) {
 				memalloc_retry_wait(GFP_NOFS);
 				goto retry;
 			}
 			if (is_dirty)
-				set_page_dirty(page);
+				folio_mark_dirty(folio);
 		}
 	}
 out:
-	f2fs_put_page(page, 1);
+	f2fs_folio_put(folio, true);
 	return err;
 }
 
-- 
2.47.2