HelenOS sources

SEC2NSEC          539 uspace/lib/c/generic/time.c 	    SEC2NSEC((ts1->tv_sec - ts2->tv_sec));
SEC2NSEC           71 uspace/lib/c/include/perf.h 	stopwatch->end.tv_nsec = nanos - SEC2NSEC(stopwatch->end.tv_sec);
SEC2NSEC           61 uspace/lib/c/test/perf.c 	PCUT_ASSERT_TRUE(diff_nanos < SEC2NSEC(5));
SEC2NSEC           71 uspace/lib/posix/include/libc/perf.h 	stopwatch->end.tv_nsec = nanos - SEC2NSEC(stopwatch->end.tv_sec);