SLP_INVAL         158 sys/ipc/msg.c  	case SLP_INVAL:
SLP_INVAL         232 sys/ipc/msg.c  			case SLP_INVAL:
SLP_INVAL         396 sys/ipc/msg.c  		sched_unsleep(t, SLP_INVAL);
SLP_INVAL         404 sys/ipc/msg.c  		sched_unsleep(t, SLP_INVAL);