1991/0712/port/sysproc.c (diff list | history)

1991/0710/sys/src/9/port/sysproc.c:517,523 – 1991/0712/sys/src/9/port/sysproc.c:517,523 (short | long | prev | next)
1991/0705		syssegfree(ulong *arg) { Segment *s; ulong from, len;
1991/0712		ulong from, pages;
1991/0705
1991/0706		from = PGROUND(arg[0]); s = seg(u->p, from, 1);
1991/0710/sys/src/9/port/sysproc.c:524,537 – 1991/0712/sys/src/9/port/sysproc.c:524,537
1991/0705		if(s == 0) errors("not in address space");
1991/0706		len = arg[1];
1991/0712		pages = (arg[1]+BY2PG-1)/BY2PG;
1991/0705		if(from+len > s->top) {
1991/0712		if(from+pages*BY2PG > s->top) {
1991/0705		qunlock(&s->lk); errors("segment too short"); } mfreeseg(s, from, len);
1991/0712		mfreeseg(s, from, pages);
1991/0705		qunlock(&s->lk); return 0;