ext2_{set_link,delete_entry}(): don't bother with page_addr

ext2_set_link() simply doesn't use it anymore and ext2_delete_entry()
can easily obtain it from the directory entry pointer...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Tested-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Author: Al Viro

fs/ext2/dir.c

@@ -464,8 +464,7 @@ static int ext2_handle_dirsync(struct inode *dir)
 }
 
 int ext2_set_link(struct inode *dir, struct ext2_dir_entry_2 *de,
-		struct page *page, void *page_addr, struct inode *inode,
-		bool update_times)
+		struct page *page, struct inode *inode, bool update_times)
 {
 	loff_t pos = page_offset(page) + offset_in_page(de);
 	unsigned len = ext2_rec_len_from_disk(de->rec_len);
@@ -586,16 +585,16 @@ int ext2_add_link (struct dentry *dentry, struct inode *inode)
  * ext2_delete_entry deletes a directory entry by merging it with the
  * previous entry. Page is up-to-date.
  */
-int ext2_delete_entry (struct ext2_dir_entry_2 *dir, struct page *page,
-			char *kaddr)
+int ext2_delete_entry(struct ext2_dir_entry_2 *dir, struct page *page)
 {
 	struct inode *inode = page->mapping->host;
+	char *kaddr = (char *)((unsigned long)dir & PAGE_MASK);
 	unsigned from = offset_in_page(dir) & ~(ext2_chunk_size(inode)-1);
 	unsigned to = offset_in_page(dir) +
 				ext2_rec_len_from_disk(dir->rec_len);
 	loff_t pos;
-	ext2_dirent * pde = NULL;
-	ext2_dirent * de = (ext2_dirent *) (kaddr + from);
+	ext2_dirent *pde = NULL;
+	ext2_dirent *de = (ext2_dirent *)(kaddr + from);
 	int err;
 
 	while ((char*)de < (char*)dir) {

fs/ext2/ext2.h

@@ -731,13 +731,11 @@ extern int ext2_inode_by_name(struct inode *dir,
 extern int ext2_make_empty(struct inode *, struct inode *);
 extern struct ext2_dir_entry_2 *ext2_find_entry(struct inode *, const struct qstr *,
 						struct page **, void **res_page_addr);
-extern int ext2_delete_entry(struct ext2_dir_entry_2 *dir, struct page *page,
-			     char *kaddr);
+extern int ext2_delete_entry(struct ext2_dir_entry_2 *dir, struct page *page);
 extern int ext2_empty_dir (struct inode *);
 extern struct ext2_dir_entry_2 *ext2_dotdot(struct inode *dir, struct page **p, void **pa);
 int ext2_set_link(struct inode *dir, struct ext2_dir_entry_2 *de,
-		struct page *page, void *page_addr, struct inode *inode,
-		bool update_times);
+		struct page *page, struct inode *inode, bool update_times);
 static inline void ext2_put_page(struct page *page, void *page_addr)
 {
 	kunmap_local(page_addr);

fs/ext2/namei.c

@@ -287,7 +287,7 @@ static int ext2_unlink(struct inode * dir, struct dentry *dentry)
 		goto out;
 	}
 
-	err = ext2_delete_entry (de, page, page_addr);
+	err = ext2_delete_entry(de, page);
 	ext2_put_page(page, de);
 	if (err)
 		goto out;
@@ -368,8 +368,7 @@ static int ext2_rename (struct mnt_idmap * idmap,
 			err = PTR_ERR(new_de);
 			goto out_dir;
 		}
-		err = ext2_set_link(new_dir, new_de, new_page, page_addr,
-				    old_inode, true);
+		err = ext2_set_link(new_dir, new_de, new_page, old_inode, true);
 		ext2_put_page(new_page, new_de);
 		if (err)
 			goto out_dir;
@@ -392,11 +391,11 @@ static int ext2_rename (struct mnt_idmap * idmap,
 	old_inode->i_ctime = current_time(old_inode);
 	mark_inode_dirty(old_inode);
 
-	err = ext2_delete_entry(old_de, old_page, old_page_addr);
+	err = ext2_delete_entry(old_de, old_page);
 	if (!err && dir_de) {
 		if (old_dir != new_dir)
 			err = ext2_set_link(old_inode, dir_de, dir_page,
-					    dir_page_addr, new_dir, false);
+					    new_dir, false);
 
 		inode_dec_link_count(old_dir);
 	}