vfs: clean up vfs_rmdir

Simplify the control flow with an out label.
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/namei.c

@@ -2563,23 +2563,26 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
 		return -EPERM;
 
 	mutex_lock(&dentry->d_inode->i_mutex);
-	if (d_mountpoint(dentry))
+
 	error = -EBUSY;
-	else {
+	if (d_mountpoint(dentry))
+		goto out;
+
 	error = security_inode_rmdir(dir, dentry);
-		if (!error) {
+	if (error)
+		goto out;
+
 	error = dir->i_op->rmdir(dir, dentry);
-			if (!error) {
+	if (error)
+		goto out;
+
 	dentry->d_inode->i_flags |= S_DEAD;
 	dont_mount(dentry);
-			}
-		}
-	}
+
+out:
 	mutex_unlock(&dentry->d_inode->i_mutex);
-	if (!error) {
+	if (!error)
 		d_delete(dentry);
-	}
-
 	return error;
 }