btrfs: pass a btrfs_inode to btrfs_readdir_put_delayed_items()

Pass a struct btrfs_inode to btrfs_readdir_put_delayed_items() as it's
an internal interface, allowing to remove some use of BTRFS_I.
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/delayed-inode.c

@@ -1730,7 +1730,7 @@ bool btrfs_readdir_get_delayed_items(struct inode *inode,
 	return true;
 }
 
-void btrfs_readdir_put_delayed_items(struct inode *inode,
+void btrfs_readdir_put_delayed_items(struct btrfs_inode *inode,
 				     struct list_head *ins_list,
 				     struct list_head *del_list)
 {
@@ -1752,7 +1752,7 @@ void btrfs_readdir_put_delayed_items(struct inode *inode,
 	 * The VFS is going to do up_read(), so we need to downgrade back to a
 	 * read lock.
 	 */
-	downgrade_write(&inode->i_rwsem);
+	downgrade_write(&inode->vfs_inode.i_rwsem);
 }
 
 int btrfs_should_delete_dir_index(const struct list_head *del_list,

fs/btrfs/delayed-inode.h

@@ -147,7 +147,7 @@ bool btrfs_readdir_get_delayed_items(struct inode *inode,
 				     u64 last_index,
 				     struct list_head *ins_list,
 				     struct list_head *del_list);
-void btrfs_readdir_put_delayed_items(struct inode *inode,
+void btrfs_readdir_put_delayed_items(struct btrfs_inode *inode,
 				     struct list_head *ins_list,
 				     struct list_head *del_list);
 int btrfs_should_delete_dir_index(const struct list_head *del_list,

fs/btrfs/inode.c

@@ -6037,7 +6037,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
 	ret = 0;
 err:
 	if (put)
-		btrfs_readdir_put_delayed_items(inode, &ins_list, &del_list);
+		btrfs_readdir_put_delayed_items(BTRFS_I(inode), &ins_list, &del_list);
 	btrfs_free_path(path);
 	return ret;
 }