internal.h 1.0 KB

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  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. #ifndef __MM_INTERNAL_H
  12. #define __MM_INTERNAL_H
  13. #include <linux/mm.h>
  14. static inline void set_page_count(struct page *page, int v)
  15. {
  16. atomic_set(&page->_count, v);
  17. }
  18. /*
  19. * Turn a non-refcounted page (->_count == 0) into refcounted with
  20. * a count of one.
  21. */
  22. static inline void set_page_refcounted(struct page *page)
  23. {
  24. VM_BUG_ON(PageCompound(page) && page_private(page) != (unsigned long)page);
  25. VM_BUG_ON(atomic_read(&page->_count));
  26. set_page_count(page, 1);
  27. }
  28. static inline void __put_page(struct page *page)
  29. {
  30. atomic_dec(&page->_count);
  31. }
  32. extern void fastcall __init __free_pages_bootmem(struct page *page,
  33. unsigned int order);
  34. #endif