spin_lock(&files->file_lock);
rcu_read_lock();
struct file fastcall *fget(unsigned int fd){	struct file *file;	struct files_struct *files = current->files;	spin_lock(&files->file_lock);	file = fcheck_files(files, fd);	if (file)		get_file(file);	spin_unlock(&files->file_lock);	return file;}