diff options
Diffstat (limited to 'sys/src/9/port/devsegment.c')
| -rw-r--r-- | sys/src/9/port/devsegment.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/sys/src/9/port/devsegment.c b/sys/src/9/port/devsegment.c index fcaf8f3e4..dfbd34fbf 100644 --- a/sys/src/9/port/devsegment.c +++ b/sys/src/9/port/devsegment.c @@ -469,7 +469,7 @@ fixedseg(uintptr va, ulong len) { KMap *k; Segment *s; - Page **f, *p, *l, *h; + Page **f, *p, *l, *h, *t; ulong n, i; int color; @@ -492,12 +492,13 @@ fixedseg(uintptr va, ulong len) continue; i = 0; - h = nil; + h = t = nil; f = &palloc.head; while((p = *f) != nil){ if(p > &l[-len] && p <= l){ *f = p->next; - p->next = h; + if((p->next = h) == nil) + t = p; h = p; if(++i < len) continue; @@ -505,15 +506,15 @@ fixedseg(uintptr va, ulong len) } f = &p->next; } - palloc.freecount -= i; if(i != len){ - while((p = h) != nil){ - h = h->next; - pagechainhead(p); + if(h != nil){ + t->next = palloc.head; + palloc.head = h; } goto Retry; } + palloc.freecount -= i; unlock(&palloc); p = &l[-len]; |