diff --git a/[refs] b/[refs] index fcf7caed2757..7e32a592110f 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 4b19de6d1cb07c8bcb6778e771f9cfd5bcfdfd3e +refs/heads/master: 6babc32c41e3642d875372cb6afbd9ade7a9f311 diff --git a/trunk/mm/page_alloc.c b/trunk/mm/page_alloc.c index e293c58bea58..27b8681139fd 100644 --- a/trunk/mm/page_alloc.c +++ b/trunk/mm/page_alloc.c @@ -268,13 +268,14 @@ void prep_compound_page(struct page *page, unsigned long order) { int i; int nr_pages = 1 << order; + struct page *p = page + 1; 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; - + 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); __SetPageTail(p); p->first_page = page; } @@ -284,6 +285,7 @@ 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); @@ -291,8 +293,9 @@ static void destroy_compound_page(struct page *page, unsigned long order) if (unlikely(!PageHead(page))) bad_page(page); __ClearPageHead(page); - for (i = 1; i < nr_pages; i++) { - struct page *p = page + i; + 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); if (unlikely(!PageTail(p) | (p->first_page != page)))