[PATCH 21/27] f2fs: Add f2fs_get_read_data_folio()

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

Convert f2fs_get_read_data_page() into f2fs_get_read_data_folio() and
add a compatibility wrapper.  Saves seven hidden calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
 fs/f2fs/data.c | 35 +++++++++++++++++------------------
 fs/f2fs/f2fs.h | 14 ++++++++++++--
 2 files changed, 29 insertions(+), 20 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index fe7fa08b20c7..f0747c7f669d 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1203,18 +1203,17 @@ int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
 	return err;
 }
 
-struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
-				     blk_opf_t op_flags, bool for_write,
-				     pgoff_t *next_pgofs)
+struct folio *f2fs_get_read_data_folio(struct inode *inode, pgoff_t index,
+		blk_opf_t op_flags, bool for_write, pgoff_t *next_pgofs)
 {
 	struct address_space *mapping = inode->i_mapping;
 	struct dnode_of_data dn;
-	struct page *page;
+	struct folio *folio;
 	int err;
 
-	page = f2fs_grab_cache_page(mapping, index, for_write);
-	if (!page)
-		return ERR_PTR(-ENOMEM);
+	folio = f2fs_grab_cache_folio(mapping, index, for_write);
+	if (IS_ERR(folio))
+		return folio;
 
 	if (f2fs_lookup_read_extent_cache_block(inode, index,
 						&dn.data_blkaddr)) {
@@ -1249,9 +1248,9 @@ struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
 		goto put_err;
 	}
 got_it:
-	if (PageUptodate(page)) {
-		unlock_page(page);
-		return page;
+	if (folio_test_uptodate(folio)) {
+		folio_unlock(folio);
+		return folio;
 	}
 
 	/*
@@ -1262,21 +1261,21 @@ struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
 	 * f2fs_init_inode_metadata.
 	 */
 	if (dn.data_blkaddr == NEW_ADDR) {
-		zero_user_segment(page, 0, PAGE_SIZE);
-		if (!PageUptodate(page))
-			SetPageUptodate(page);
-		unlock_page(page);
-		return page;
+		folio_zero_segment(folio, 0, folio_size(folio));
+		if (!folio_test_uptodate(folio))
+			folio_mark_uptodate(folio);
+		folio_unlock(folio);
+		return folio;
 	}
 
-	err = f2fs_submit_page_read(inode, page_folio(page), dn.data_blkaddr,
+	err = f2fs_submit_page_read(inode, folio, dn.data_blkaddr,
 						op_flags, for_write);
 	if (err)
 		goto put_err;
-	return page;
+	return folio;
 
 put_err:
-	f2fs_put_page(page, 1);
+	f2fs_folio_put(folio, true);
 	return ERR_PTR(err);
 }
 
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 8f23bb082c6f..3e02df63499e 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3895,8 +3895,8 @@ int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count);
 int f2fs_reserve_new_block(struct dnode_of_data *dn);
 int f2fs_get_block_locked(struct dnode_of_data *dn, pgoff_t index);
 int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index);
-struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
-			blk_opf_t op_flags, bool for_write, pgoff_t *next_pgofs);
+struct folio *f2fs_get_read_data_folio(struct inode *inode, pgoff_t index,
+		blk_opf_t op_flags, bool for_write, pgoff_t *next_pgofs);
 struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index,
 							pgoff_t *next_pgofs);
 struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
@@ -3926,6 +3926,16 @@ int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi);
 void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi);
 extern const struct iomap_ops f2fs_iomap_ops;
 
+static inline struct page *f2fs_get_read_data_page(struct inode *inode,
+		pgoff_t index, blk_opf_t op_flags, bool for_write,
+		pgoff_t *next_pgofs)
+{
+	struct folio *folio = f2fs_get_read_data_folio(inode, index, op_flags,
+			for_write, next_pgofs);
+
+	return &folio->page;
+}
+
 /*
  * gc.c
  */
-- 
2.47.2