mm/internal.h

   1 /* internal.h: mm/ internal definitions
   2  *
   3  * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 static inline void set_page_refs(struct page *page, int order)
  13 {
  14 #ifdef CONFIG_MMU
  15         set_page_count(page, 1);
  16 #else
  17         int i;
  18
  19         /*
  20          * We need to reference all the pages for this order, otherwise if
  21          * anyone accesses one of the pages with (get/put) it will be freed.
  22          * - eg: access_process_vm()
  23          */
  24         for (i = 0; i < (1 << order); i++)
  25                 set_page_count(page + i, 1);
  26 #endif /* CONFIG_MMU */
  27 }
  28
  29 extern void fastcall __init __free_pages_bootmem(struct page *page,
  30                                                 unsigned int order);