}
void prep_compound_page(struct page *page, unsigned long order)
+{
+ int i;
+ int nr_pages = 1 << order;
+
+ set_compound_page_dtor(page, free_compound_page);
+ set_compound_order(page, order);
+ __SetPageHead(page);
+ for (i = 1; i < nr_pages; i++) {
+ struct page *p = page + i;
+
+ __SetPageTail(p);
+ p->first_page = page;
+ }
+}
+
+#ifdef CONFIG_HUGETLBFS
+void prep_compound_gigantic_page(struct page *page, unsigned long order)
{
int i;
int nr_pages = 1 << order;
set_compound_page_dtor(page, free_compound_page);
set_compound_order(page, order);
__SetPageHead(page);
- for (i = 1; i < nr_pages; i++, p++) {
- if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0))
- p = pfn_to_page(page_to_pfn(page) + i);
+ for (i = 1; i < nr_pages; i++, p = mem_map_next(p, page, i)) {
__SetPageTail(p);
p->first_page = page;
}
}
+#endif
static void destroy_compound_page(struct page *page, unsigned long order)
{
int i;
int nr_pages = 1 << order;
- struct page *p = page + 1;
if (unlikely(compound_order(page) != order))
bad_page(page);
if (unlikely(!PageHead(page)))
bad_page(page);
__ClearPageHead(page);
- for (i = 1; i < nr_pages; i++, p++) {
- if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0))
- p = pfn_to_page(page_to_pfn(page) + i);
+ for (i = 1; i < nr_pages; i++) {
+ struct page *p = page + i;
if (unlikely(!PageTail(p) |
(p->first_page != page)))