pm_partusage
int pm_partusage(struct pm_devs *, int, int);
retvalue += pm_partusage(pm_cur, id, do_del);
pm_partusage(my_pm, -1, 1);
pm_partusage(my_pm, -1, -1);
pm_partusage(my_pm, -1, -1);
if (pm_partusage(pm_i, i, 0) != 0)