simple_unlink(parent->d_inode, dentry);
error = simple_unlink(dir, dentry);
rpc_unlink(struct dentry *dentry){	struct dentry *parent = dentry->d_parent;	down(&parent->d_inode->i_sem);	if (dentry->d_inode) {		rpc_close_pipes(dentry->d_inode);		rpc_inode_setowner(dentry->d_inode, NULL);		simple_unlink(parent->d_inode, dentry);	}	up(&parent->d_inode->i_sem);	inode_dir_notify(parent->d_inode, DN_DELETE);	rpc_put_mount();}