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authorDavid S. Miller <davem@davemloft.net>2008-11-07 01:43:03 -0500
committerDavid S. Miller <davem@davemloft.net>2008-11-07 01:43:03 -0500
commit9eeda9abd1faf489f3df9a1f557975f4c8650363 (patch)
tree3e0a58e25b776cfbee193195460324dccb1886c7 /mm/page_alloc.c
parent61c9eaf90081cbe6dc4f389e0056bff76eca19ec (diff)
parent4bab0ea1d42dd1927af9df6fbf0003fc00617c50 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: drivers/net/wireless/ath5k/base.c net/8021q/vlan_core.c
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c28
1 files changed, 21 insertions, 7 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d0a240fbb8bf..54069e64e3a8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -263,24 +263,39 @@ void prep_compound_page(struct page *page, unsigned long order)
263{ 263{
264 int i; 264 int i;
265 int nr_pages = 1 << order; 265 int nr_pages = 1 << order;
266
267 set_compound_page_dtor(page, free_compound_page);
268 set_compound_order(page, order);
269 __SetPageHead(page);
270 for (i = 1; i < nr_pages; i++) {
271 struct page *p = page + i;
272
273 __SetPageTail(p);
274 p->first_page = page;
275 }
276}
277
278#ifdef CONFIG_HUGETLBFS
279void prep_compound_gigantic_page(struct page *page, unsigned long order)
280{
281 int i;
282 int nr_pages = 1 << order;
266 struct page *p = page + 1; 283 struct page *p = page + 1;
267 284
268 set_compound_page_dtor(page, free_compound_page); 285 set_compound_page_dtor(page, free_compound_page);
269 set_compound_order(page, order); 286 set_compound_order(page, order);
270 __SetPageHead(page); 287 __SetPageHead(page);
271 for (i = 1; i < nr_pages; i++, p++) { 288 for (i = 1; i < nr_pages; i++, p = mem_map_next(p, page, i)) {
272 if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0))
273 p = pfn_to_page(page_to_pfn(page) + i);
274 __SetPageTail(p); 289 __SetPageTail(p);
275 p->first_page = page; 290 p->first_page = page;
276 } 291 }
277} 292}
293#endif
278 294
279static void destroy_compound_page(struct page *page, unsigned long order) 295static void destroy_compound_page(struct page *page, unsigned long order)
280{ 296{
281 int i; 297 int i;
282 int nr_pages = 1 << order; 298 int nr_pages = 1 << order;
283 struct page *p = page + 1;
284 299
285 if (unlikely(compound_order(page) != order)) 300 if (unlikely(compound_order(page) != order))
286 bad_page(page); 301 bad_page(page);
@@ -288,9 +303,8 @@ static void destroy_compound_page(struct page *page, unsigned long order)
288 if (unlikely(!PageHead(page))) 303 if (unlikely(!PageHead(page)))
289 bad_page(page); 304 bad_page(page);
290 __ClearPageHead(page); 305 __ClearPageHead(page);
291 for (i = 1; i < nr_pages; i++, p++) { 306 for (i = 1; i < nr_pages; i++) {
292 if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0)) 307 struct page *p = page + i;
293 p = pfn_to_page(page_to_pfn(page) + i);
294 308
295 if (unlikely(!PageTail(p) | 309 if (unlikely(!PageTail(p) |
296 (p->first_page != page))) 310 (p->first_page != page)))