- case ITIMER_REAL:
- del_timer_sync(¤t->real_timer);
- expire = timeval_to_jiffies(&value->it_value);
- current->it_real_value = expire;
- current->it_real_incr =
- timeval_to_jiffies(&value->it_interval);
- if (!expire)
- break;
- if (expire > (unsigned long) LONG_MAX)
- expire = LONG_MAX;
- current->real_timer.expires = jiffies + expire;
- add_timer(¤t->real_timer);
- break;
- case ITIMER_VIRTUAL:
- cputime = timeval_to_cputime(&value->it_value);
- if (cputime_gt(cputime, cputime_zero))
- cputime = cputime_add(cputime,
- jiffies_to_cputime(1));
- current->it_virt_value = cputime;
- cputime = timeval_to_cputime(&value->it_interval);
- current->it_virt_incr = cputime;
- break;
- case ITIMER_PROF:
- cputime = timeval_to_cputime(&value->it_value);
- if (cputime_gt(cputime, cputime_zero))
- cputime = cputime_add(cputime,
- jiffies_to_cputime(1));
- current->it_prof_value = cputime;
- cputime = timeval_to_cputime(&value->it_interval);
- current->it_prof_incr = cputime;
- break;
- default:
- return -EINVAL;
+ case ITIMER_REAL:
+ spin_lock_irq(&tsk->sighand->siglock);
+ interval = tsk->signal->it_real_incr;
+ val = it_real_value(tsk->signal);
+ if (val)
+ del_timer_sync(&tsk->signal->real_timer);
+ tsk->signal->it_real_incr =
+ timeval_to_jiffies(&value->it_interval);
+ it_real_arm(tsk, timeval_to_jiffies(&value->it_value));
+ spin_unlock_irq(&tsk->sighand->siglock);
+ if (ovalue) {
+ jiffies_to_timeval(val, &ovalue->it_value);
+ jiffies_to_timeval(interval,
+ &ovalue->it_interval);
+ }
+ break;
+ case ITIMER_VIRTUAL:
+ nval = timeval_to_cputime(&value->it_value);
+ ninterval = timeval_to_cputime(&value->it_interval);
+ read_lock(&tasklist_lock);
+ spin_lock_irq(&tsk->sighand->siglock);
+ cval = tsk->signal->it_virt_expires;
+ cinterval = tsk->signal->it_virt_incr;
+ if (!cputime_eq(cval, cputime_zero) ||
+ !cputime_eq(nval, cputime_zero)) {
+ if (cputime_gt(nval, cputime_zero))
+ nval = cputime_add(nval,
+ jiffies_to_cputime(1));
+ set_process_cpu_timer(tsk, CPUCLOCK_VIRT,
+ &nval, &cval);
+ }
+ tsk->signal->it_virt_expires = nval;
+ tsk->signal->it_virt_incr = ninterval;
+ spin_unlock_irq(&tsk->sighand->siglock);
+ read_unlock(&tasklist_lock);
+ if (ovalue) {
+ cputime_to_timeval(cval, &ovalue->it_value);
+ cputime_to_timeval(cinterval, &ovalue->it_interval);
+ }
+ break;
+ case ITIMER_PROF:
+ nval = timeval_to_cputime(&value->it_value);
+ ninterval = timeval_to_cputime(&value->it_interval);
+ read_lock(&tasklist_lock);
+ spin_lock_irq(&tsk->sighand->siglock);
+ cval = tsk->signal->it_prof_expires;
+ cinterval = tsk->signal->it_prof_incr;
+ if (!cputime_eq(cval, cputime_zero) ||
+ !cputime_eq(nval, cputime_zero)) {
+ if (cputime_gt(nval, cputime_zero))
+ nval = cputime_add(nval,
+ jiffies_to_cputime(1));
+ set_process_cpu_timer(tsk, CPUCLOCK_PROF,
+ &nval, &cval);
+ }
+ tsk->signal->it_prof_expires = nval;
+ tsk->signal->it_prof_incr = ninterval;
+ spin_unlock_irq(&tsk->sighand->siglock);
+ read_unlock(&tasklist_lock);
+ if (ovalue) {
+ cputime_to_timeval(cval, &ovalue->it_value);
+ cputime_to_timeval(cinterval, &ovalue->it_interval);
+ }
+ break;
+ default:
+ return -EINVAL;