vfs: switch ->show_options() to struct dentry *

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index d5d5297..79673eb 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -246,9 +246,9 @@
 	return err;
 }
 
-static int devpts_show_options(struct seq_file *seq, struct vfsmount *vfs)
+static int devpts_show_options(struct seq_file *seq, struct dentry *root)
 {
-	struct pts_fs_info *fsi = DEVPTS_SB(vfs->mnt_sb);
+	struct pts_fs_info *fsi = DEVPTS_SB(root->d_sb);
 	struct pts_mount_opts *opts = &fsi->mount_opts;
 
 	if (opts->setuid)