3453 void set_user_nice(struct task_struct *p, long nice)  in set_user_nice()  argument
3459 	if (task_nice(p) == nice || nice < MIN_NICE || nice > MAX_NICE)  in set_user_nice()
3473 		p->static_prio = NICE_TO_PRIO(nice);  in set_user_nice()
3480 	p->static_prio = NICE_TO_PRIO(nice);  in set_user_nice()
3505 int can_nice(const struct task_struct *p, const int nice)  in can_nice()  argument
3508 	int nice_rlim = nice_to_rlimit(nice);  in can_nice()
3523 SYSCALL_DEFINE1(nice, int, increment)  in SYSCALL_DEFINE1()  argument
3525 	long nice, retval;  in SYSCALL_DEFINE1()  local
3533 	nice = task_nice(current) + increment;  in SYSCALL_DEFINE1()
3535 	nice = clamp_val(nice, MIN_NICE, MAX_NICE);  in SYSCALL_DEFINE1()
3536 	if (increment < 0 && !can_nice(current, nice))  in SYSCALL_DEFINE1()
3539 	retval = security_task_setnice(current, nice);  in SYSCALL_DEFINE1()
3543 	set_user_nice(current, nice);  in SYSCALL_DEFINE1()