HelenOS sources

ts_add            335 uspace/drv/time/cmos-rtc/cmos-rtc.c 		ts_add(&curtime, &rtc->boot_time);
ts_add            146 uspace/lib/c/include/time.h extern void ts_add(struct timespec *, const struct timespec *);
ts_add            146 uspace/lib/posix/include/libc/time.h extern void ts_add(struct timespec *, const struct timespec *);