spin_unlock(&files->file_lock);
rcu_read_unlock();
static inline int get_close_on_exec(unsigned int fd){	struct files_struct *files = current->files;	struct fdtable *fdt;	int res;	spin_lock(&files->file_lock);	fdt = files_fdtable(files);	res = FD_ISSET(fd, fdt->close_on_exec);	spin_unlock(&files->file_lock);	return res;}