demos/itimer.patch

   1  int do_setitimer(int which, struct itimerval *value,
   2                  struct itimerval *ovalue)
   3 {
   4    unsigned long expire;
   5    cputime_t cputime;
   6    int k;
   7    if (ovalue && (k = do_getitimer(which, ovalue)) < 0)
   8      return k;
   9    switch (which) {
  10      case ITIMER_VIRTUAL:
  11        cputime = timeval_to_cputime(&value->it_value);
  12 -      if (cputime_eq(cputime, cputime_zero))
  13 -         cputime = jiffies_to_cputime(1);
  14 +      if (cputime_gt(cputime, cputime_zero))
  15 +         cputime = cputime_add(cputime,
  16 +                                       jiffies_to_cputime(1));
  17        current->it_virt_value = cputime;
  18        cputime = timeval_to_cputime(&value->it_interval);
  19        current->it_virt_incr = cputime;
  20        break;
  21      case ITIMER_PROF:
  22        cputime = timeval_to_cputime(&value->it_value);
  23 -        if (cputime_eq(cputime, cputime_zero))
  24 -           cputime = jiffies_to_cputime(1);
  25 +        if (cputime_gt(cputime, cputime_zero))
  26 +          cputime = cputime_add(cputime,
  27 +                                        jiffies_to_cputime(1));
  28          current->it_prof_value = cputime;
  29          cputime = timeval_to_cputime(&value->it_interval);
  30          current->it_prof_incr = cputime;
  31          break;
  32        default:
  33          return -EINVAL;
  34    }
  35    return 0;
  36 }