/* internal.h: mm/ internal definitions
   *
   * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */

  #ifndef __MM_INTERNAL_H
  #define __MM_INTERNAL_H
  
  #include <linux/mm.h>

  static inline void set_page_count(struct page *page, int v)

  {

  	atomic_set(&page->_count, v);
  }
  
  /*
   * Turn a non-refcounted page (->_count == 0) into refcounted with
   * a count of one.
   */
  static inline void set_page_refcounted(struct page *page)
  {

  	VM_BUG_ON(PageTail(page));

  	VM_BUG_ON(atomic_read(&page->_count));

  	set_page_count(page, 1);

  }

  static inline void __put_page(struct page *page)
  {
  	atomic_dec(&page->_count);
  }

  extern void __free_pages_bootmem(struct page *page, unsigned int order);

  /*
   * function for dealing with page's order in buddy system.
   * zone->lock is already acquired when we use these.
   * So, we don't need atomic page->flags operations here.
   */
  static inline unsigned long page_order(struct page *page)
  {
  	VM_BUG_ON(!PageBuddy(page));
  	return page_private(page);
  }

  
  /*
   * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
   * so all functions starting at paging_init should be marked __init
   * in those cases. SPARSEMEM, however, allows for memory hotplug,
   * and alloc_bootmem_node is not used.
   */
  #ifdef CONFIG_SPARSEMEM
  #define __paginginit __meminit
  #else
  #define __paginginit __init
  #endif

  #endif