aufs: v5.12-rc1 idmapper userns 2/2, set path->mnt earlier

To make aufs internal functions can prepare 'userns' for VFS internal
functions.
Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>

fs/aufs/dirren.c

@@ -254,6 +254,7 @@ static int au_dr_hino(struct super_block *sb, aufs_bindex_t bindex,
 	err = PTR_ERR(hinopath.dentry);
 	if (IS_ERR(hinopath.dentry))
 		goto out_unlock;
+	hinopath.mnt = path->mnt;
 
 	err = 0;
 	flags = O_RDONLY;
@@ -284,7 +285,6 @@ static int au_dr_hino(struct super_block *sb, aufs_bindex_t bindex,
 		}
 		flags = O_WRONLY;
 	}
-	hinopath.mnt = path->mnt;
 	hinofile = vfsub_dentry_open(&hinopath, flags);
 	if (suspend)
 		au_hn_inode_unlock(hdir);