wait4            1625 kernel/exit.c  SYSCALL_DEFINE4(wait4, pid_t, upid, int __user *, stat_addr,
wait4            1652 kernel/exit.c  COMPAT_SYSCALL_DEFINE4(wait4,
wait4             572 tools/perf/builtin-stat.c 			wait4(child_pid, &status, 0, &stat_config.ru_data);