4 files changed, 21 insertions(+), 3 deletions(-)

M pc/devfloppy.c
M pc/devhard.c
M port/proc.c
M port/sysproc.c

@@ 409,7 409,8 @@ floppykproc(void *a)
 	Drive *dp;
 	int disp = 0;
 
-	waserror();
+	while(waserror())
+		;
 	for(;;){
 		for(dp = floppy.d; dp < &floppy.d[conf.nfloppy]; dp++){
 			if(dp->motoron && TK2SEC(m->ticks - dp->lasttouched) > 5

@@ 174,7 174,7 @@ hardgen(Chan *c, Dirtab *tab, long ntab, long s, Dir *dirp)
 	name[NAMELEN] = 0;
 	qid.path = MKQID(drive, s);
 	l = (pp->end - pp->start) * dp->bytes;
-	devdir(c, qid, name, l, 0600, dirp);
+	devdir(c, qid, name, l, 0666, dirp);
 	return 1;
 }
 

@@ 732,6 732,15 @@ kproc(char *name, void (*func)(void *), void *arg)
 	 * Sched
 	 */
 	if(setlabel(&p->sched)){
+		/*
+		 *  use u->p instead of p, because we
+		 *  don't trust the compiler, after a
+		 *  gotolabel, to find the correct contents
+		 *  of a local variable.  Passed parameters
+		 *  (func & arg) are a bit safer since we
+		 *  don't play with them anywhere else.
+		 */
+		p = u->p;
 		p->state = Running;
 		p->mach = m;
 		m->proc = p;


@@ 756,13 765,14 @@ kproc(char *name, void (*func)(void *), void *arg)
 	p->parent = 0;
 	memset(p->time, 0, sizeof(p->time));
 	p->time[TReal] = MACHP(0)->ticks;
-	ready(p);
 	/*
 	 *  since the bss/data segments are now shareable,
 	 *  any mmu info about this process is now stale
 	 *  and has to be discarded.
 	 */
 	flushmmu();
+	clearmmucache();
+	ready(p);
 }
 
 void

@@ 103,6 103,13 @@ rfork(ulong flag)
 	 * Sched
 	 */
 	if(setlabel(&p->sched)){
+		/*
+		 *  use u->p instead of p, because we
+		 *  don't trust the compiler, after a
+		 *  gotolabel, to find the correct contents
+		 *  of a local variable.
+		 */
+		p = u->p;
 		p->state = Running;
 		p->mach = m;
 		m->proc = p;