find_pid_ns
pid = find_pid_ns(init_ublksrv_tgid, &init_pid_ns);
fl->c.flc_pid = pid_nr_ns(find_pid_ns(ffl->pid, fc->pid_ns), &init_pid_ns);
pid = find_pid_ns(fl->flc_pid, &init_pid_ns);
extern struct pid *find_pid_ns(int nr, struct pid_namespace *ns);
pid = find_pid_ns(common->pid, common->ns);
pid = find_pid_ns(common->pid_visiting, common->ns);
pid = find_pid_ns(common->pid, common->ns);
EXPORT_SYMBOL_GPL(find_pid_ns);
return find_pid_ns(nr, task_active_pid_ns(current));
return pid_task(find_pid_ns(nr, ns), PIDTYPE_PID);