[PATCH 3/7] minifs: Convert minix_set_link() and minix_dotdot() to take a folio

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

This matches ext2 and removes a few hidden calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/minix/dir.c   | 23 ++++++++++-------------
 fs/minix/minix.h |  4 ++--
 fs/minix/namei.c | 10 +++++-----
 3 files changed, 17 insertions(+), 20 deletions(-)

diff --git a/fs/minix/dir.c b/fs/minix/dir.c
index 3bbfac32d520..c32d182c2d74 100644
--- a/fs/minix/dir.c
+++ b/fs/minix/dir.c
@@ -404,40 +404,37 @@ int minix_empty_dir(struct inode * inode)
 }
 
 /* Releases the page */
-int minix_set_link(struct minix_dir_entry *de, struct page *page,
+int minix_set_link(struct minix_dir_entry *de, struct folio *folio,
 		struct inode *inode)
 {
-	struct inode *dir = page->mapping->host;
+	struct inode *dir = folio->mapping->host;
 	struct minix_sb_info *sbi = minix_sb(dir->i_sb);
-	loff_t pos = page_offset(page) + offset_in_page(de);
+	loff_t pos = folio_pos(folio) + offset_in_folio(folio, de);
 	int err;
 
-	lock_page(page);
-	err = minix_prepare_chunk(page, pos, sbi->s_dirsize);
+	folio_lock(folio);
+	err = minix_prepare_chunk(&folio->page, pos, sbi->s_dirsize);
 	if (err) {
-		unlock_page(page);
+		folio_unlock(folio);
 		return err;
 	}
 	if (sbi->s_version == MINIX_V3)
 		((minix3_dirent *)de)->inode = inode->i_ino;
 	else
 		de->inode = inode->i_ino;
-	dir_commit_chunk(page, pos, sbi->s_dirsize);
+	dir_commit_chunk(&folio->page, pos, sbi->s_dirsize);
 	inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
 	mark_inode_dirty(dir);
 	return minix_handle_dirsync(dir);
 }
 
-struct minix_dir_entry * minix_dotdot (struct inode *dir, struct page **p)
+struct minix_dir_entry *minix_dotdot(struct inode *dir, struct folio **foliop)
 {
-	struct folio *folio;
 	struct minix_sb_info *sbi = minix_sb(dir->i_sb);
-	struct minix_dir_entry *de = dir_get_folio(dir, 0, &folio);
+	struct minix_dir_entry *de = dir_get_folio(dir, 0, foliop);
 
-	if (!IS_ERR(de)) {
-		*p = &folio->page;
+	if (!IS_ERR(de))
 		return minix_next_entry(de, sbi);
-	}
 	return NULL;
 }
 
diff --git a/fs/minix/minix.h b/fs/minix/minix.h
index a290dd483e69..6ed34209ed33 100644
--- a/fs/minix/minix.h
+++ b/fs/minix/minix.h
@@ -69,9 +69,9 @@ int minix_add_link(struct dentry*, struct inode*);
 int minix_delete_entry(struct minix_dir_entry*, struct page*);
 int minix_make_empty(struct inode*, struct inode*);
 int minix_empty_dir(struct inode*);
-int minix_set_link(struct minix_dir_entry *de, struct page *page,
+int minix_set_link(struct minix_dir_entry *de, struct folio *folio,
 		struct inode *inode);
-struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
+struct minix_dir_entry *minix_dotdot(struct inode*, struct folio **);
 ino_t minix_inode_by_name(struct dentry*);
 
 extern const struct inode_operations minix_file_inode_operations;
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 117264877bd7..ba82fa3332f1 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -180,7 +180,7 @@ static int minix_rename(struct mnt_idmap *idmap,
 {
 	struct inode * old_inode = d_inode(old_dentry);
 	struct inode * new_inode = d_inode(new_dentry);
-	struct page * dir_page = NULL;
+	struct folio * dir_folio = NULL;
 	struct minix_dir_entry * dir_de = NULL;
 	struct folio *old_folio;
 	struct minix_dir_entry * old_de;
@@ -195,7 +195,7 @@ static int minix_rename(struct mnt_idmap *idmap,
 
 	if (S_ISDIR(old_inode->i_mode)) {
 		err = -EIO;
-		dir_de = minix_dotdot(old_inode, &dir_page);
+		dir_de = minix_dotdot(old_inode, &dir_folio);
 		if (!dir_de)
 			goto out_old;
 	}
@@ -212,7 +212,7 @@ static int minix_rename(struct mnt_idmap *idmap,
 		new_de = minix_find_entry(new_dentry, &new_folio);
 		if (!new_de)
 			goto out_dir;
-		err = minix_set_link(new_de, &new_folio->page, old_inode);
+		err = minix_set_link(new_de, new_folio, old_inode);
 		folio_release_kmap(new_folio, new_de);
 		if (err)
 			goto out_dir;
@@ -235,13 +235,13 @@ static int minix_rename(struct mnt_idmap *idmap,
 	mark_inode_dirty(old_inode);
 
 	if (dir_de) {
-		err = minix_set_link(dir_de, dir_page, new_dir);
+		err = minix_set_link(dir_de, dir_folio, new_dir);
 		if (!err)
 			inode_dec_link_count(old_dir);
 	}
 out_dir:
 	if (dir_de)
-		unmap_and_put_page(dir_page, dir_de);
+		folio_release_kmap(dir_folio, dir_de);
 out_old:
 	folio_release_kmap(old_folio, old_de);
 out:
-- 
2.43.0