kernel: more kproc pexit() and sleep error handling

sys/src/9/bitsy/power.c

@@ -237,6 +237,9 @@ powerkproc(void*)
 {
 	ulong xlink, xlink1;
 
+	while(waserror())
+		;
+
 	for(;;){
 		while(powerflag == 0)
 			sleep(&powerr, powerdown, 0);
@@ -247,7 +250,6 @@ powerkproc(void*)
 		deepsleep();
 		xlink1 = getcallerpc(&xlink1);
 
-
 		delay(2000);
 
 //		iprint("deepsleep returned, pc = 0x%lux, sp = 0x%lux\n", xlink1, &xlink);

sys/src/9/bitsy/wavelan.c

@@ -682,6 +682,8 @@ w_timer(void* arg)
 	Ctlr* ctlr = (Ctlr*)ether->ctlr;
 
 	ctlr->timerproc = up;
+	while(waserror())
+		;
 	for(;;){
 		tsleep(&up->sleep, return0, 0, MSperTick);
 		ctlr = (Ctlr*)ether->ctlr;
@@ -732,7 +734,7 @@ w_timer(void* arg)
 		}
 		iunlock(ctlr);
 	}
-	pexit("terminated", 0);
+	pexit("terminated", 1);
 }
 
 void

sys/src/9/ip/il.c

@@ -1145,6 +1145,8 @@ ilackproc(void *x)
 
 	il = x;
 
+	while(waserror())
+		;
 loop:
 	tsleep(&up->sleep, return0, 0, Iltickms);
 	for(s = il->conv; s && *s; s++) {

sys/src/9/ip/rudp.c

@@ -733,6 +733,8 @@ relackproc(void *a)
 
 	rudp = (Proto *)a;
 
+	while(waserror())
+		;
 loop:
 	tsleep(&up->sleep, return0, 0, Rudptickms);
 

sys/src/9/ip/tcp.c

@@ -747,6 +747,9 @@ tcpackproc(void *a)
 	tcp = a;
 	priv = tcp->priv;
 
+	while(waserror())
+		;
+
 	for(;;) {
 		tsleep(&up->sleep, return0, 0, MSPTICK);
 

sys/src/9/kw/ether1116.c

@@ -776,6 +776,8 @@ rcvproc(void* arg)
 
 	ether = arg;
 	ctlr = ether->ctlr;
+	while(waserror())
+		;
 	for(;;){
 		tsleep(&ctlr->rrendez, gotinput, ctlr, 10*1000);
 		ilock(ctlr);

sys/src/9/mtx/mmu.c

@@ -76,6 +76,9 @@ mmusweep(void*)
 	int i, x, sweepcolor;
 	ulong *ptab, *ptabend, ptecol;
 
+	while(waserror())
+		;
+
 	for(;;) {
 		if(PIDCOLOR(m->mmupid) != m->trigcolor)
 			sleep(&m->sweepr, work, nil);

sys/src/9/ppc/mmu.c

@@ -80,6 +80,9 @@ mmusweep(void*)
 	int i, x, sweepcolor;
 	ulong *ptab, *ptabend, ptecol;
 
+	while(waserror())
+		;
+
 	for(;;) {
 		if(PIDCOLOR(m->mmupid) != m->trigcolor)
 			sleep(&m->sweepr, work, nil);

sys/src/9/teg2/ether8169.c

@@ -855,6 +855,8 @@ rproc(void* arg)
 
 	edev = arg;
 	ctlr = edev->ctlr;
+	while(waserror())
+		;
 	for(;;){
 		/* wait for next interrupt */
 		ilock(&ctlr->reglock);

sys/src/9/teg2/main.c

@@ -692,7 +692,6 @@ init0(void)
 		poperror();
 	}
 	kproc("alarm", alarmkproc, 0);
-//	kproc("startcpusproc", startcpusproc, nil);
 
 	touser(sp);
 }