static page *__rmqueue(zone *zone, byte order)
{
free_area *area;
byte current_order;
page * page;
for (current_order = order; current_order < MAX_ORDER; ++current_order)
{
area = zone->Free_area + current_order;
if (list_empty(&area->Free_list))
{
continue;
}
//page = list_entry(area->free_list.next, page, lru);
page = list_entry__1(area->Free_list.Next);
list_del(&page->Lru);
rmv_page_order(page);
area->Nr_free--;
zone->Free_pages -= 1UL << order;
return(expand(zone, page, order, current_order, area));
}
return(null);
}
static page *expand(zone *zone, page *page, int low, int high, free_area *area)
{
uint size = (uint)1 << (byte)high;
while (high > low)
{
area--;
high--;
size >>= 1;
//BUG_ON(bad_range(zone, &page[size]));
list_add(&page[size].Lru, &area->Free_list);
area->Nr_free++;
set_page_order(&page[size], high);
}
return(page);
}
static page *buffered_rmqueue(zone *zone, int order, int gfp_flags)
{
ulong flags;
page *page = null;
//int cold = !!(gfp_flags & __GFP_COLD);
//if (order == 0)
//{
// per_cpu_pages* pcp;
// pcp = &zone->pageset[get_cpu()].pcp[cold];
// local_irq_save(flags);
// if (pcp->count <= pcp->low)
// pcp->count += rmqueue_bulk(zone, 0,
// pcp->batch, &pcp->list);
// if (pcp->count)
// {
// page = list_entry(pcp->list.next, page, lru);
// list_del(&page->lru);
// pcp->count--;
// }
// local_irq_restore(flags);
// put_cpu();
//}
//if (page == null)
//{
// //spin_lock_irqsave(&zone->lock_, flags);
// page = __rmqueue(zone, order);
// //spin_unlock_irqrestore(&zone->lock_, flags);
//}
//if (page != null)
//{
// BUG_ON(bad_range(zone, page));
// //mod_page_state_zone(zone, pgalloc, 1 << order);
// prep_new_page(page, order);
// if (gfp_flags & __GFP_ZERO)
// prep_zero_page(page, order, gfp_flags);
// if (order && (gfp_flags & __GFP_COMP))
// prep_compound_page(page, order);
//}
return(page);
}
